How do you fight against a much more powerful enemy when combat would result in instant defeat?
Or really, in Achilles's case given his unique capabilities, he just needed to establish physical contact with enemies who were much more powerful than himself. If he could make that critical connection through touching their existence directly, he could test out Perfect Resonance Integration and determine whether his Assimilations would truly be instantaneous even against supremely powerful opponents whose capability exceeded his own by orders of magnitude.
As he saw the scorching attack descending toward him with speed that suggested the skeletal dragon commander wasn't particularly concerned about him evading, his eyes shone with sudden ingenuity as he actually did not move or raise any defensive authorities. He instead released a single sentence calculated to traverse the distance between them in the span of an instant before the flames could consume his form.
