all weak point training in my opinion should not only be at the beginning of the week when you're fresh, but should be at the beginning of your workout - train front delts before training the rest of your delts, or train calves before your legs - it helps insure you are training them the hardest since you're fresher.
forgive my ignorance, based on my avatar, where is the inner head of the tricep?
for the long head - middle of my arm going to my elbows, i do dips (weighted). to start the horseshoe at the top, i use the ^ shaped bar. to tie them in together, i'd use a rope. for the back part (far left), i use the bar shaped like a "W" with an underhand outside grip. the weird striations in the middle, i only get when i dip below 10% body fat. hope that helps.
p.s. my calves suck, so someone else give him ideas.