I had invested a lot in luck. And then I just took equipment if it boosted luck. I almost only found magical items, in the end I only bothered by picking up the orange coloured ones to identify since my hero, death knight and summoning dolls had orange items equiped.

This was my weapon for my death knight (found it in BF Act II in one the first dungeons)

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And my Hero's crossbow (granted, I found this in Act III, had a similar one since Act II but with less boosts)

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Warcraft 3: The Frozen Throne stats