I think Saw is better.
Stats for saw: 1-9 with some accuracy(agi).
Stats for lens: 1-8, 10 tp, 50 hp
Here is what I think: If you're level 25 and you hit like 30s with lens, you miss a few times, but with saw you barely ever miss and when you miss with lens it's a 0 and when you miss with a lens with a saw you'd probably hit so it's like +30 damage for saw wt's very hard to explain, anyone understand me? XD