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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It can never be just "Here is better loot" its always gotta be "Here is better loot but you now gotta sit on this cactus for no apparent reason"