"Hey robots, the party is just getting started over here, why don't you stay a while" Gildarts says while he moves towards the main group of robots that has gathered to capture the escaped people, and starts punching his way through as many of them as he can. After he's punched through as many of the little robots as he can he makes his to Mr.Friendly's side hoping that the big robot was at least angered by Mr.Friendly's trick and will try to attack him, which will allow Gildarts to intercept the blow and deal some damage towards the big robot too, because of his aura (note that the robots would not know about his yet due to subtle 2)
Assuming the little robots are minions, I'll take 10 on my attack rolls and power attack 5/All-out Attack 3 ending up with an attack bonus of +10 (20 total if I'm able to take 10) and a corrosion rank 13 (Fort DC 23, Toughness DC 28), after I've used takedown attack on as many as I can I'll move-by-action to end my turn by Mr.Friendly and will use interpose with Withstand Damage 5 against the big robot's attack, If Mr.Friendly is targeted. This will lower my defence to a base 10 and leave me flat-footed but boost my toughness to +17 and If it's a melee attack the big robot will be subject to my Corrosion Aura. Let me know If the smaller robots aren't minions and I'll make attack rolls for them.