I recently bought the expansion, got like 20-25 hours in my monk and already have the full Sunwoko set bonus + mantras set bonus (with ring) and the Daibo for reduced cost and + damage on wave of light (only 3,2k dps though), and I've salvaged quite a few additional pieces. Done grift 36, but I haven't really focused much on grifts yet. 36 was hard survival wise, but I finished it with plenty of time left on my first and only attempt. Try not to get above 30-33, as those are pretty easy and fast.
Luck varies of course, but I don't think 20-25 hours in much when we're talking about Diablo