I don't think anyone can answer the first part of your question. Since lst'ing the plant is something you'd do extra, not something you'd be neglecting the plant by doing. You MAY potentially gain bud by doing, but you're really not going to lose any bud by not doing it. Some of the pro's here may be able to give you an idea of increase in yield, but I don't think it can be given with any sort of accuracy. That's just my opinion, so take it for what it is.
Now for your nutes, especially when using time release soil, I personally don't use veg nutes at all. I've grown a couple of NL autos from Nirvana and mine have started flowering within weeks 3-4. I do seem to run a bit N deficient, sol you might want to watch for that, but I only use flower nutes with my autos. Again, that's just my method, some of the more experienced guys might chime in with something different. Other than that one brown spot and the missing tip of another leaf, she's looking pretty to me so far. Good luck with her!
