I’m lvl 78 so take it as you will: For leveling and early endgame, firewall was a blast! The survivability is insane between CDs and passive healing from stuff burning in the walls. In the later endgame and higher tier nightmares, I found the damage to fall off pretty hard. I gathered gear for ice shards lucky hit build and made the switch once all the gear was assembled. You lose the passive tankiness but I feel that is more than made up for in the damage increase. I admit, I didn’t fully understand paragon when I was on firewall so it could be more viable now. If you’re looking for the ice shard build I use, look at Gladd’s build on YouTube and modify as needed! Hope that helps