I squatteh heavy for years over 500 for a max...definition is a combo of diet and squeezing the muscles as hard as humanlu possible on contracted positions like leg extensions.
Stiff deads are for hmas, yes.
dumbell lunges with 65 pound dumbells or one-legg split squats(lunges) on a smith machime with 155
Hack Squats - done on a leg press machine...um...search it - ther shouls be some pics