i'd say my triceps are a good size....(relative to the rest of me)
and I've done the whole spectrum of this and that throughout the years.....I think it is good to switch up exercises for the tris every so often.....I have done skullcrushers consistently throughout the years, and used to do up to 8 sets of pressdowns using different grips at the end of my workout.
but, I find that when I do something different for a few weeks, they respond well.
Right now I am doing a DC type routine, so I am mainly doing overhead extensions, skullcrushers, dips, and close grips (on different days)
also, I would say go as heavy as possible......