When I use Best in Bag it shows a possible 17.1% HPS improvement.
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When I use Best in Slot and limit it to content I can do I get a 11.4% HPS improvement (which looks to fully upgrade every item).
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I expected BiS to be higher than what I can achieve with the gear I already have. Have I set the settings wrong?
Also, 17% BiB is a much larger improvement than I thought I could get by changing my gems and enchants and swapping 3 items, as the BiB result is only about +2% crit, +4.5% haste, +1.3% vers and a -16.4% loss of mastery.
Is this huge difference in potential output because my mastery is over 40%?
You are not doing an apples-to-apples comparison. Your Best in Bags setup has several customization options enabled whereas Best in Slot does not.
In particular, once you use a custom secondary stat distribution, the scoring becomes very relative – the percent increase doesn’t really correspond to HPS anymore… it is something of a hybrid of our HPS estimate and a metric for how “close” you are to your desired stat distribution.
I tried that custom stat allocation ages ago when the expansion released and forgot about it!
For months I did not notice I had a custom strategy still saved.
Now BiB is down to 5% as an upgrade that makes sense.
Mr Robot is too smart and I feel silly not noticing I had a custom strat.