>>20013936Not sure what accuracy has to do with anything..? Nothing will affect there accuracy.
Adamant plus Tough Claws allows him to out power his base form+Life Orb while still being way faster and bulkier. Jolly might be usable, but as far as I can tell, it doesn't outspeed anything notable other than Scarf-Ape like
>>20013812 noted. In short, it's potentially a waste of valuable Atk points.
>>20013940Having a counter or check doesn't relegate a Pokemon to uselessness. Metagross' main problem was that it couldn't excell at anything. Aegislash can't even OHKO with a +2 Shadow Sneak against standard Gross, let alone Mega with his buffed defenses.
Meanwhile, EQ likely OHKOs attack form Aegi. If anything, it's a draw between the two of them.