Here's my $.02 on slump busters.
A while back I banged one. I won't feed you excuses for why I went dry because then there'll be slings and arrows (NO EXCUSES!) headed for me. But anyway I met a girl, read her attraction, and in a day or two we banged. She was my type except that she was older (39) and with a few extra pounds. Anyway I never had any other intention for her than sex. She was nice, good in bed, and it was a good experience.
Another time, my friends introduced me to a girl who was definitely DTF. She too had a few extra pounds. More than the previous one. While I liked her vibe and face and tawny skin, in the end I declined to make a move or ask her out. The reason is simple: My friends would know. I'm not ashamed to admit that when my SMV is on display, I'm going to protect it. Also, I wasn't in a slump per se, but really it was about lowering my SMV.
Now, you'll probably tell me I should have been like that when NOBODY was watching. Maybe you're right. But I was in that spot and you weren't, and I was cool with the cost/benefit calculus. No regrets. I think slump busters can be helpful, but every man has to make that call for himself.
As for no-fapping, to each his own on that. I don't find that it makes much of a difference other than not wearing out the skin and affecting the sensation. I've tried no-fap and it does not give me some magical shot of testosterone. The body is self-governing, it's not going to over-produce. However the truth is I've been so busy that I just haven't found time to jerk off very often...when it does occur to me I'm usually tired or hungry or something. But if the urge does come over me and I have the time, sure, why not.