I use FF as well. WW is sensitive to nutes and responds well to about 1/4 recommended feeding during veg and about 1/3 during flower. If you want the 'extreme stone' then switch your lights to 8/16 the last 2 weeks (and flush well). FIM the HELL out of them in Veg, they can take mutiple FIM's every 2 weeks, I just created a C99 with 4 tops, and roughly 60 budsites that would have lollipopped nicely - WW seems to have the same growing characteristics, and I think would benefit well from the lollipop, but I haven't done it yet, and unfortunately won't be able to put this to practice that before you start your FIM.

As far as abuse, I've noticed no issues, multiple transplants, cuts, etc without a hermie. I think if you can only put 16 jack flash under 3 1k lights then you need to cut back on the lights or start utilizing your grow space, you can fit 16 5 gallon buckets under 1 light. If your going for a longer veg stage and your using the 30 gallon bags, your gonna need more light! (this basically means I don't know anything about your grow, so I can't give advice here) but if your worried about her being bushy, I wouldn't spend so much time on FIM