When I get to the point where I can see 4 abs, I might then consider adding compounds just to go a step further with it. For now I'm making very decent progress just with diet and training (losing about 1 - 2 kg per week).
I realise I could use T3 & Var to get the ab definition I want, but since I don't plan on taking steroids for the rest of my life, I don't know if there's much point in unnaturally reaching a body shape that I can't naturally maintain. Maybe I'll just get my abs as defined as I can without drugs and be happy enough with that. In fairness I'm glad just not to have a belly right now.