What is the best stim-free, non-AI Test Booster?

[Al Shades]

I'm looking for a solid test/libido booster that isn't based around an AI like 6-oxo/ATD/Form/Bromo/etc. I haven't tried any herbal Test supps in the past.

I'm going to be taking this on off days during a 3x/wk Epistane pulse to keep my natural production going.

Needs to be stim-free, and I don't need a "kitchen sink" formula - I already take enough pills. I need to stimulate natural T production and libido.

[Rodja]

Drive or Activate Extreme.

[Al Shades]

Oh, I forgot to mention that I'd like to be able to take the test booster at night and first thing in the morning on off days of my epi pulse.

[poison]

Drive

[Vitruvian]

IGF-2

(in addition to the great suggestions above)

[Neil5585]

Has anyone tried high doses of Eurycoma (aka long jax, tongkat ali)? Along the lines of 3+g a day?