Have no idea what you're talking about with re-high, but it really shouldn't matter in the end what way you do it, if you think of net amount of drugs.
However, this is why I think you should always do benzos AFTER opiates. Based upon both personal experience, and a close friend almost dying over it:
If you take the opiates first, you're just going to be jammed. Sure you might be pretty wrecked and nodding out, but it's not going to make you act stupid, the way benzo's do. So you'll be more inclinded to take 1 pill at a time, or whatever, be more reasonable.
However, when you take the benzo's first, especially when mixed with alcohol, if not careful you'll end up with "benzo blackouts". So you end up being retarded and blacking out, possibly doing things you normally wouldn't do. Now being in this condition you go and shoot up a shitload of heroin in one shot, and die.
If you had to choose which of these was more likely to happen:
Mistaking the amount of benzos you are taking because you are nodding out or
mistaking the amount of opiates you are taking because your benzoed out of your mind?
and no problem