JComp, i found that cycling jack3d works well and you tend to avoid building a tolerance to the effects.
when i use it, its either 3 weeks on 1 week off, or 4 weeks on 2 weeks off..
I never really got any increased pumps with jack3d. I had good energy and focus and love it as a preworkout but just finished up my second tub and it really lost its kick so i need to find something different this time.
jack3d + anadraulic pump is solid too
JComp, i found that cycling jack3d works well and you tend to avoid building a tolerance to the effects.....