Another thing that should be added is that *most* bosses stop autoattacking(aka do 0 damage) whenever they are casting mechanics of any kind. This is especially noticeable in fights like Exdeath and O3S.
You can easily observe that after the first spellblade holy mechanic in O3S:
In the timeframe between "After the first spellblade holy mechanic" and "After the first completed game-mechanic", the boss executes just 5~6 autoattacks in a timespan of 40~ seconds while only casting 1 raidaoe, no tankbusters, no adds and otherwise avoidable aoe damage. That's 40 seconds where a tank staying in tankstance is doing very, very little.
And that's just one example of this happening in O3S, I'm sure you could easily find many more similar cases in O3S alone where autoattack damage is just not happening because of casted mechanics.
