I think celestial is ok and nerfing is counter productive. If you don't want to lose a fight then stay in the zerg. Or practice and get better. There are allot of people that love to duel, duel them. If you want to roam, pick a class that has a good roaming build, ie. mobility, stun breaks, stuns, reflects, invulns, and ofc damage. Whatever it takes to win. Don't hate a class because it beats you, play it or ask around for what beats it and play that. Find your niche, and if you just want to get away, play engineer and slot a tank build that will get you to your zerg, or an ele, warrior, necro. Every class has a get away almost unkillable build that you can use until you get to where you are going and then you can shift to what you want to run. Or you can use that unkillable class to troll, that can be fun.
All I'm saying is don't get hung up on one build and expect it to outperform everything. You must fine tune your build, tweak it to squeeze its potential, and then master it. Keep in mind what you want it to do, if it doesn't fit the role then you must change the build or class. Have fun in the game of war and realize, if no one dies then it mine as well be open world pve perish the thought. And if celestials go away, the glass cannon and aids condi meta will return, and you will kill or die in 3 seconds.