My mechanic will reach level 5 soon and I was thinking of giving him the feat technomantic dabbler so I can try to pull off the following maneuver.
First of all I'm going to give my combat drone improved combat maneuver bull rush and the armor upgrade juggernaut boosters. My mechanic always rides his drone during combat. The plan is to have my mechanic cast supercharge weapon on his greataxe (standard), use his photoenergenic node to set it on fire (move), and double his strength bonus to damage by using his early stage adaptation (swift). Then I'll have his drone bull rush the enemy. If it succeeds in the bull rush the target is then moved 5' or 10' and both the mechanic and drone get AOO's. For the Barathu mechanic his AOO would include the bonuses from supercharge weapon, the photoenergetic node, and early stage adaptation which would total 5d6+4 on top of his weapon and normal strength bonus damage.
So is this legal?
You used a standard action (to cast spell), a move action (activate biotech ability), and a swift action (activate racial ability).
Limited AI each round on your turn, after you have acted, your drone can take either a move action or a standard action to attack.
Bullrush is a standard action.
The attack of opportunity is a reaction.
Attack of Opportunity When you threaten a space and the opponent moves out of that space in any way other than a guarded step or withdraw action, you can use your reaction to make a melee attack against the opponent.
Mechanic, yes. Drone, no. Drones have limited actions.