Yeah, I tried a variation on that one, stopping at imp 3 or 4 depending on on how I ordered my attacks. If this is the intended solution and we need to follow some exact obscure order of operations to deal with the punishments just right, then the devs need to rework the puzzle.
Not a big fan of puzzle #1 to be honest; it really has very little to do with the god, uses arbitrary piety thresholds and then ignores the standard method of operation of his boons.