We need to do something about Tanks and Outgoing Damage from Bosses

[YukioKobayashi]

Then I assume you havent done any EW or DT's ultimate or play a WAR before, removing the damage reduction and shield from bloodwhetting as well as nascent flash and leaving WAR with only rampart and vengeance to cycle through and with how frequently and hard hitting the tankbusters come at it is a fast express ticket to "Why we even have a WAR in this fight?" We all know 30%+ 20% isn't 50% that's why we need 10% mitigations on bloodwhetting so you don't have to pop both rampart and vengeance and waste their big cooldowns to survive a tankbuster which is what you trying to justify its removal. Also the WAR doesn't need the trait of extra health and healing because it already has all of that as Thrill of battle and yet it still need extra covers from healers and co-tank in high-end fights. And in current Ultimates, tankbusters rarely hit one tank only, you can't expect the healers and the co-tank to dump resources on a WAR alone, removing nascent flash is also not an option since WAR needs it to cover their co-tank as well for those tankbusters, why would you want to remove "the supportive" one while also say "work as a team would increase the fun as well?" that's why we even have 2 tanks in fights. Also dps have their defensive skills as well and they been using them to help not only the tanks but the party to survive in Ultimates.

Im really not sure what tankbuster you are talking about that hits so hard it would immediately kill you the moment you dont have the 10% from Stem the Flow.
Even Wave Canon hits "only" for like 75k with 2Min, Your Jobs 90s , Physranged Mit, Tank Partymit , Succor , Expedient and Healer ST. The 10% would reduce what.. 15k at most? The old Warrior MaxHP trait would give you 27k more HP instead to a total of around 155k with your 90s, 137k without 90s.
But thats not really the point here. Taking away defensive options on any tank wouldnt fix the sustain and solo capability problem of tanks outside of savage and ultimates. The self sustain is the problem and needs to be nerfed on all tanks especially warrior.