Right now you can run ultimate for tier 5 loot at A or even A+ at a delta of 0 or even +10-20 if you are smart with the customise option for the modifiers.
So how is forcing a -30 delta at all times supposed to be making it easier?
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The streamers have been at 450 or more for weeks. That's all they care about is making sure they get free advertising. The game has sucked rotten eggs since hitting 450. I've clawed my way to 460 and there is little interest in playing content that fosters misery for barely any loot.