Jemal already answered the action economy problem. I still don't like the idea that lacking abilities only gives a bonus for NPCs. Your transform is fine, but massivly out of scale.
The GM advantage of his robots not being summons are that they are not able to go anywhere with the character during a stealth mission. If they are damaged it is a bit more inconvenient than just having to re-summon them.
Sorry, I missed this this earlier due to post ninjitsu. I took a look at what I'd be able to afford building the bots with the minion advantage. Here's a draft of the warbot model (there would be 3-4 other bots total, slightly less combat capable, but specialized, and all active under their own intelligence at the same time, with Singularity himself able access to an accurate Create to fight alongside)[sblock]
Minion - PL 10
Abilities -16pp
Strength 0, Stamina -, Agility 0, Dexterity 0, Fighting 0, Intellect 0, Awareness 0, Presence -3
Advantages 2pp
Accurate Attack, All-out Attack
Skills 2pp
Perception 4 (+4)
Powers 73pp
Immunity: Immunity 30 (Fortitude Effects) 30pp
Protection: Protection 10 (+10 Toughness) 10pp
Weapons Array 33pp
. .
Affliction 10 (Resisted by: Fortitude, DC 20; Accurate 5: +10, Increased Range: ranged)
. .
Cumulative Affliction 10 (DC 20; Accurate 5: +10, Cumulative)
. .
Cone Area Damage 10 (DC 25; Cone Area: 60 feet cone, Selective)
. .
Damage 10 (DC 25; Increased Range 2: perception)
Offense
Initiative +0
Affliction: Affliction 10, +10 (DC Fort 20)
Affliction: Cumulative Affliction 10, +10 (DC Fort/Will 20)
Damage: Cone Area Damage 10 (DC 25)
Damage: Damage 10 (DC 25)
Defense
Dodge 10, Parry 10, Fortitude Immune, Toughness 10, Will 9
Power Points
Abilities -16 + Powers 73 + Advantages 2 + Skills 2 (4 ranks) + Defenses 29 = 90[/sblock]
He doesn't have any wild cost saving measures. But I hope you see why I think that the minion advantage route is problematic. Since they would be the most expensive part of the character, I would be unhappy when the bots aren't available. But no one would be happy when they are available, because having them all be able to do different things with their own actions would be a pain to manage and
ridiculously powerful. I should also mention that, under the summon rules, the warbot and bombots would have to be repaired if damaged. Only the PL 8 variable type ones would be of the 'crunch all you want' variety.