In reply to slab_happy:
I assume you mean anaerobic endurance. I do pyramid shaped repeaters with both hands on with my finger board. 4s, 6s, 8, 10, 8, 6, 4s with 5 sec in between. In fact, I often miss out the 10 second peak, but I get very pumped. Repeat 7 our more times with only 1 min rest. Eric Hörst I think.
I don't know if its the best, but I get pumped, which is the main point