Monstar
I do heavy dumbell pullovers. I think stretch position movements are invaluable to muscle size and strength. 2 techniques I use are,
1 Use the stretch position movemen as your second movement. When you perform the exercise stay in the stretch position for about a second or 2. This technique always seems to lead to some deep soreness the next day. Which leads me to believe, that it is incorporating fibers deeper in the muscle.
2 Use the stretch position movement first. Utilize a regular tempo, but do a double impact or 1 1/4 rep style. Then move to a contracted or midrange movement like a chinup.
These 2 techniques have really helped me to strengthen all my laging bodyparts. And increase all the other ones as well.