I know this is probably blasphemy on this site; but if you don't want to carry a knife and a blade on the multitool (cos of one ounce of redundancy). Why carry a knife?
Survivorman only carries a multi tool and it seems to do everything. It's more defensible in court and in the UK is the only way of carrying a locking blade legally.
Or you could stop worrying about trivia like an ounce of steel extra to carry...
simon