cbetting is pretty much a requirement at my level. Only one other player at the table is capable of a float.

To be honest, I struggle with this concept as well, but it seems to me that semi-bluffs are more important on the turn than the flop. C-Betting every flop that is unco-ordinated and doesn't hit your opponents range is +ev imo.

It's the turn that you're making decisions like this, because A) your opponents range narrows, and B) the percentage you need to hit your hand is much more clear.

Sauce's noob 6-max guide suggests shoving your largest draws on the turn. I'm guessing anysort of a combo draw (like a flushdraw with a pair, or a straight flush draw, or a gutshot straight with 2 overs.) due to FE plus the fact that at that point the pot should be pretty large, and you'll be putting in only a little bit more than the size of the pot.

Anyway, I guess what I'm trying to say with that ramble is this: Semibluffs should be math based, more than feel based.