Without any pure BG, you are relying solely on YP and HBG as your forage base. HBG are typically 90-95% males, this means they have a low reproduction rate. Not a good trait for a forage species. Your YP have a higher reproductive rate, but do not handle LMB predation well and will be extirpated from your pond in a generation or two. Without additional adult sized fish stockings, you won't have any YP in your pond. That would leave HBG, LMB and pellets. Depending on your goals, that can be a fine combination. What are your goals?