Why not just guarantee an item drop from every creep?
And if that is problematic, potentially reduce the number of creeps on stage 1 and make that stage take less time, killing two birds with one stone? To prevent ridiculous item combos (aka double/triple rageblade/locket/guinsoo’s), just make it so that you can’t stack duplicate items.
I don’t see why getting or not getting items from creeps has anything to do with skill expression. Note here, I know that the pbe has changes to make certain item drops guaranteed, but that doesn’t prevent people from being three or even four completed items up from you by the end of stage 1, and it doesn’t mean that regular mobs on the guaranteed item drop stages won’t drop items. What this ultimately means is the difference between a good luck streak and a bad luck streak, or heck, even an average luck streak is actually huge. Once again, I don’t see how that benefits “tactics.” The rng of what drop you will get is already plenty enough rng as it is.