Thanks in advance to those who will answer
No items will increase the drop rates from bosses of any kind. If you're in the higher percentile of folks doing damage to a field or world boss, then you get a slightly better loot pool, but that's only way to affect boss drops. And of course, there is no such thing for dark rift bosses, since you do them solo. If you want good drops, ultimately, you just have to pray that you get good luck. Of course, you will do better over time if you make sure that you clear out dark rift bosses as soon as they show up, since then you'll end up fighting them more often, which means more chances for them to drop good stuff, but the chances of each individual time you fight them aren't going to change no matter what you do.
Yes maybe less time tips and + increases the item drop, but ... it should fix this bug in my opinion..