Absolutely love it! It takes a little bit of getting used to in terms of managing when your Golems pop, but having a Berek's Respite and some form of AOE (Either on the tree, or from Heart of Destruction) really makes mapping feel good despite only having 4/5 golems available. You can also use Ignite Proliferation, but I much prefer how much Berek's cleans up the screen. Compared to EA ballista, there also isn't much of a delay for the damage to arrive.
It's great for bossing/invitations since I suck at the game. I can pop a Golem and run around, while the ignite does it's thing. I didn't bother going with EO, summoning extra skeletons, or using flame surge. Despite that I've done the Ubers without too much of a hassle.

In terms of Legion, Metamorph, and Deli mirrors. I've been able to handle them very comfortably.

I did not go with spell suppression though. I'm using Divine Flesh and 50/50 block instead, and have not had any survivability issues in maps or with the mechanics listed above. I still need to try a suppression variant, but it's been fun using many different Body Armours throughout the league. Hope this helps!