Triceps Iso-Holds?

Hey CT,
Just a quick question on iso holds for triceps… I’ve been doing 20 sec holds pre set doing DB extension holding at the half way point…

My questions are

  1. this the right way to do it, in terms of angle of hold? I find it hard to find that sweet spot, not as easy as finding it for biceps

  2. What are/is the best iso hold exercise for triceps?

  3. Are mTorr technique more effective than iso holds for triceps, am I better off doing techniques like that for triceps?

Thanks for the help,