In the beginning I like to only go for a single pack of wasps, simply to put pressure on the opponent, and especially some lower-level opponents start instantly overreacting and buy 2 packs of mustangs. But once the Wasps start actually hitting hard, I'm not 100% sure. I think I recall the Wasps even if you buy them with elite not doing all that much because it's just 2 levels, and they are way worse than the super duper Carry Wasps you have. So all in all, making your board better so the Carry Wasps can carry more seems more worth it to me, but I might just be wrong.