What's the distance to it? Can I move and hit it with a Color Spray (15 ft range)? Or is it too far? If I can reach it, the text below will be my actions. If not, I guess he'll charge it. If he's out of range for
that, he'll pull out his sling and attack with that, I guess. (Can a sling be pre-loaded? Or does it always take a move action to load it after drawing it?)
Legion moves up to the creature, his shield in one hand and mace in the other, and a fan of multicolored light springs from his outstretched hand.
Attack and damage if he's out of range for color spray:
Rolled 1d20+4 : 6 + 4, total 10
Rolled 1d8+3 : 3 + 3, total 6
I had him listed with his shield equipped, so we'll roll with that, even though he's not proficient with it. He'll take a -2 to his attack from non-proficiency, countered by charging, and the +2 AC from the shield is countered by the -2 from charging.
His AC after the charge will be 14.