Brave Frontier

Well Dual Tridon is a passive 20% mitigation. Even if it was changed to be multiplicative, that's still 17.50% (8.75% + 8.75%) mitigation on top of the 87.5%. Yeah I know it doesn't really make sense to nerf, but Tridon's current state makes everything that's not Global Exclusive an absolute joke, and that sounds like really bad game design IMHO.

Loch had his self spark buff nerfed from 300% to 200%. Blueizard had his 50% ATK debuff nerfed from three turns to one, but they gave him a Ruby-esque buff on his UBB as compensation.

Also I completely forgot; What the hell is going to happen to Tridon's shield? Having his S/BB shield stack with his UBB shield will beyond break the game.

The multiplicative stacking wouldn't work like that. On top of the 87.5% from a 75% UBB and 50% BB, Dual Tridon would bring the mitigation up 89.875% if they stack seperately or 90% if the two 10% stack to 20% because of spaghetti code. It works the same way as ignore PDR in maplestory. 1-((1-0.5)(1-0.75)(1-0.1)^2). Furthermore, without UBB mitigation, BB + 1 Tridon lead becomes 55% mitigation and dual Tridon becomes 59.5%. In terms of mitigation, the change makes double Tridon weaker than single Tridon currently is... Overall, the mitigation stacking change hurts Tridon and makes him a bit less desirable as a lead compared to other HP leads IMO.

The changes to those other units are definitely unwarranted. UBB are still far from spammable and theirs are trash compared ones that buff the party.

Tridon shield stacking will be very interesting considering they are different elements. In theory, all they'd need to do is add a hierarchy for the shields or make them the same element, but I'm expecting hella bugs.