I can't comment on the Feruchemy stuff.
This is a fun stunt. I like it. combine it with a luck power
Glad you like it!
It might be a bit unfair with a luck power, though.
Thank you for your wonderful idea, i agree with Taren lucky shot is awesome, however, I was thinking of a more tankish type of swat agent...
It sounds like you mostly want Power and Stunt suggestions.
For his own abilities, there are a number of directions you could go. Strategist would work, as would +2 to Contacts within the military, as would some kind of bonus for wielding a shield (armour 1 or using Weapons + 1 to defend against all attacks would seem appropriate).
For the drone, I suggest an IoP/Item Limitation attached to some Supernatural Senses, Alertness stunts, or the Drones custom Power.
For the symbiote, here's a set of Powers you could use:
Stage 1 (symbiote very subtle)
Inhuman Toughness [-2]
Inhuman Recovery [-2]
The Catch (whatever) [+X]
Stage 2 (symbiote obvious to user)
Echoes of the Beast (Symbiote species) [-1]
Guide My Hand [-1]
Inhuman Toughness [-2]
Inhuman Recovery [-2]
The Catch (whatever) [+X]
Stage 3 (Symbiote obvious to everyone)
Potent Ranged Natural Weaponry [-3]
Wings [-1]
Echoes of the Beast (Symbiote species) [-1]
Guide My Hand [-1]
Inhuman Toughness [-2]
Inhuman Recovery [-2]
The Catch (whatever) [+X]
It starts out by reinforcing your body, then starts talking to you, then reshapes your body to create wings and weaponry.
That aside, you may want to check
this out.