Cool, thanks for the backgrounder. Usually on a cut, the strategy for optimal fat-loss is to preserve muscle while starving off the fat. It's pretty hard to bring up endurance (slow twitch and VO2MAX) and strength (fast-twitch and CNS) at the same time under the best of circumstances; harder still while on sub-maintenance calories. What has worked for me - and seems to make sense, given the literature - is as follows:
- Begin the cut with very little change to your current training. Bring up endurance base now, while you're still juicy enough to support the work without it totally wiping you out.
- As the cut proceeds, drop training volume down a bit while keeping the iron on the bar. Introduce metabolic work (sprint intervals, complexes, supersets). Maintain endurance base by following metabolic work with low-intensity steady-state cardio (read: modest cycling, slow jogging, or fast walking up a modest incline)
- Gradually decrease training volume as the cut deepens. Keep the heavy stuff in, ditch all accessory work. Maintain strength base with low-rep heavy work. Metabolic cardio a few times a week; follow lifting or metabolic work with steady-state cardio.
Diet wise, pick your poison. I'm beginning to appreciate intermittent fasting these days, and tend to keep the fats up but that's me; ultimately whatever lets you maintain a deficit will do the trick. Bigrene's cycle sounds good, but you've never pinned before. Why not just stick with test for now; maybe toss in some winny at the end; leave the more exotic compounds for next cycle.