From Excadrill's set analysis:
Jolly vs Adamant comes down to Speed over Power. Generally, Jolly's ability to at worst, tie with opposing Excadrill and outspeed +spe Rotom-W makes it more reliable, although Adamant's sheer power can't be understated
Ok, I just tried to play the Halo 4 Campaign for the first time on Legendary because I heard it is the easiest Campaign in the series, I wanted to up the challenge so I put 9 skulls on. Now I can't even kill an Elite ONE ON ONE!