Unfortunately, while being good at the class/spec does help, it’s not the biggest factor.
I managed to get the druid bear challenge done yesterday, after a lot of attempts over the period of this event. I had so many 5% wipes. a 0.3% wipe. a 0.6% wipe. And every time I was that close, I’d look at Details. Oh, my trinket barely proc’d. Oh, Unbridled Fury only did 4% that attempt. Some attempts were kinda doomed from the start of P2 since Velen would stack orbs right on top of each other.
The attempt I finally managed to kill it, I again looked at Details. Iskar’s trinket from HFC did like 18% of my damage. Potion of Unbridled Fury did almost 10%, Ravaged Seed Pod was 6%, double Shadowcore Oil was 3%. Literally like 35% of my damage for the entire encounter was from RNG procs. Arguably people have done it without those trinkets, but it’s really hard unless the stars align due to how strict the DPS requirement is.
If you’ve got him to 2%, you are basically there though. I assume you’ve been using the Potion of Unbridled Fury? If so, may be worth taking a trip to HFC to try and get Iskars caster trinket. Even on pulls where it doesn’t proc a lot, it can still easily be 10% or more of your damage. And if you haven’t been using the Potion, you should.
For what it’s worth, I definitely agree that it is frustrating. During Legion the Mage Tower was mostly about doing the mechanics, with the occasional burst dps tidbit(Agatha’s Shield, Ice wall in Xylem, the dudes shield in the Sigryn fight). Kruul leaned a bit heavier on needing DPS but back then it was also much easier to survive 5 Annihilates which gave a bit more leeway in the damage needed to beat him.
I agree with this too. Though some people will say “nah you just suck, get gud”. But the simple fact is, this iteration of the tower is tuned to Nighthold levels of difficulty, with some exceeding that. When the original tower was balanced around Tomb of Sargeras gear(with two legendary items and the artifact). That said, Kruul is one of the more balanced challenges, but he still could use another health reduction to ease the insane DPS needed.
All that said, if you are truly out of time for attempts, I’m sorry. I know this time of year is hectic for a lot of people. You are super close though, hopefully you find some time to squeeze in some more attempts, if not…Hopefully Blizzard will wake up and make the adjustments needed so more people, yourself included, can actually enjoy this content opposed to growing frustrated and disheartened.