i'm at the very end of act 2
hero with luck 122 - every single item has +10 luck.
it all started with getting a lucky cap +12 right at the very beginning of act1
anyways i have approximately 10 different items with two slots and 5+ with 3 or 4 slots. most of them are acutally pretty cool even without the slots.
btw i do do in and outs very often from the battlefields. also my hero with high luck is always the leader and always opens chests. items ai find are atmost level 6. (thru act 2)
also i noticed that at the very end of act 2 - holy water - once only the fat woman had it and once all five merchants had it.
haven't found anything above 4 free slots.