For number of summons: this would not be a change accross the board for other sets. And was merely a suggestion, the devs have the knowledge to ignore it and do it the traditional way if it'd cause gameplay difficulty to be unbalanced for this specific power set.
Attack 1: actually, As you'll note there Disorient was an edit I made, I too expected it'd be identical to the robotics blaster, but I was wrong I give you the official information from the wiki on Rikti blasters:
https://wiki.cityofheroesrebirth.com/wiki/Rikti Rikti Rifle Ranged,
Energy, Foe Knockback,
DisorientThe Rikti Rifle takes a while to recharge, but deals a lot of damage and can Knockback and Disorient foes.
Rikti Pistol Ranged,
Energy,
Foe DisorientThe Rikti pistol deals nominal damage, but can Disorient its target.
on the headgunman:
Rikti Rifle Ranged,
Energy,
Foe Knockdown,
DisorientThe Rikti Gunman has a powerful cannon built into his armor. This weapon takes a while to recharge, but deals a lot of damage and can Knockdown and Disorient foes.
As you can see it's a theme in Rikti Weapons. As such though originally I just made it what I thought a blaster would be like, I was forced to add Disorient allong with KB or KD because thats how this specific weapon (which is already in CoH) comes. Also do note in purple, the damage type is Only Energy. Robotics Pulse Rifle is Energy/Smash. Therefore it's actually different enough.
As for attack intensity It really depends on the set, the 1st power in a set can vary wildly anywhere from minor damage to high damage. never seen it above that for a first tier power, but yes high is possible. I've not seen it on an MM set before, others are Minor, Moderate or Minor DoT but rikti weapons are no joke hence high in fact if you look at the damage they do in game when held by the rikti it's definitely High damage. But lets get into the reasons:
Light/Minor is <50, Moderate is around 50, High is around 100
From the descriptions posted:
Rikti Pistol = Minor Damage (key word "Nominal")
Rikti Rifle = High Damage (key words "a lot of damage")
likely it'll be the rifle as that would be in theme for MMs, thus A lot of (High) damage.
Level 2, yes this set was devised to be pet heavy (it is an "Invasion" after all the idea is tons of pet damage to chew through things and not much else), the goal was to fit-in all the various "aliens" in the game (except nictus). This one is rikti monkies, which are kinda weak in the HP and def/res department, keeping them healed would be an issue as in this set you only get 1 AoE heal and it's click type and very long recharge. Modify Alien at Level 6 doesn't heal, it just increases the Max HP of something (Once) that means it wont stack unless stacked by another player. Rikti Monkies are not that OP. yes they have psionic damage (which most enemies don't have def/res to) but keeping them alive is going to be the challenge you'd have to take the medicine pool, and Boss Aoe will likely toast them. Making their summon have a longer recharge time might balance it to prevent you from summoning them faster than they can be AoE fragged.
level 6: all MM's get an upgrade power of some sort at this level. The difference here is you are basically swapping the alien for a stronger alien in the same group, thats all. simply because Infantry/Conscript are kinda fodder HP-wise as are most other summons in this set at thier base value. they have less HP than pets in other sets so upgrading to a stronger alien will increase their HP and make them roughly equivalent in ability to stand to other sets. Suggesting limits to this is understandable, as typed below under Invasion Portal (L18) it'll probably be fair to limit the player to 1 Magus, or alternatively 1 Max upgrade pet of Summon Power Levels 1, or 8, and +1 at L26. Rikti Conscript/Infantry (to Magus),or Drone (To Heavy Assault Suit) and +1 Shivan ( the rest wont upgrade past the Tier below that; Rikti (Chief [something]), Drone (Advanced Drone), Shivan (Smasher or Destroyer whatever is fair)
The reason I don't include rikti monkies or the shivan are for 2 different reasons, the most dangerous rikti monkey is the Vicious Rikti Monkey which TBH is ... really not much different from the lowest form in HP nor intensity, it's the equivalent of going from a Minion to a Minion (if Rikti Gorillas ever get made, then yeah limit it with the rest), and the Shivan is intended to be a boss class (though it starts as a non-boss!)
https://wiki.cityofheroesrebirth.com/wiki/Shivans ("Shivan" is the Minion Class of this group. Shivan Decimator is the EB.
In this entire set only 3 summons can become EB (and this could be Player-Level restricted! in Modify Alien!) Rikti, Drone, and Shivan, by limiting the player to summonning Either a EB Rikti OR Drone and one EB Shivan they get 2 EBs max.
Level 18: is already in-game!:
Transponder Build Transponder
The Rikti Communications Officer can create an inter-dimensional Transponder. Other Rikti soldiers can teleport in through this Transponder to join their allies. This power is interruptible. The Transponder can be destroyed.
"The Transponder can Be Destroyed" this is what makes it not OP. That and summons via it are delayed. in game from memory you get 1 summon every 10? to 25? seconds. At 10 seconds you would need nearly 1 minute to summon 5 (MAX) Fodder class aliens. Maybe these should not be upgradable IF you already have the normal summon of that type upgraded. So if you had Infantry/Conscripts from your L1 power upgraded to Chief[something] (maybe limit the player to 1 Magus I.E.) then the conscripts/infantry summoned via invasion portal will not be able to upgrade till one of your upgraded aliens of that type dies or is unsummoned.
Balancing a power like this is possible.
Level 8: again All Pets In This Set Are Summoned at Minion Class even the drones! to make them a lieut you'd have to upgrade after summoning (the amount of Modified aliens of Any tier could be player-level-restricted. I.E. 1 Lieut till 12, at 12 you could be allowed 2, and at 26+ more. could even do no boss or higher from modify alien till 26 and you only get 2 EB. Shivan and 1 other; Drone or Rikti others don't have EB.
In this set, there is only 1 ranged attack available to the player. If they want more they'll have to get it from pools or ancillaries. that means that unlike other MMs this set has very little ability to stand without pets, and most of it's pets are Fodder-kill initially, the player will have to struggle to keep pets summoned as they barely have their own recourses to defend themselves (1 high damage attack). This is a fair trade. especially with restrictions set on Modify Alien to limit the number of each tier of alien based on player level.
Level 12, a single summon of a non-Lieut, you'd have to upgrade it. and as specified before we can set limits. making this power actually weak.
L26: the Shivan is a Minion class at summon. it takes alot of upgrading to get it to EB.
L32: the ONLY heal power in this set. Very Long Recharge. again if L6 limits the number of upgrades to each tier, I.E. at L50; 2 EB OR 2 Boss, 3 Lieut, max# minion (5+3). then L6 is not an overpowered buff, and with the recharge on this one it's not overpowered either. It's a temporary buff basically for pets that sould survive a hit by something nasty this allows them to have a second chance to attack before being defeated. it also heals and buffs other players in the area temporarily but again Very Long Recharge so not that frequently. It might last 3 minutes as a buff and likely a 6 minute+ recharge time. even at -100% rech so it's practically auto, thats a heal every 3 minutes!. it has it's strengths, it has it's weaknesses.
this was the idea behind all these. It can be balanced as is. It's not a joke set at all. it's Ayyyy.