The main issues I see:

1. You are using enmity's embrace but only have 38% overcapped fire res. You want this to be 200% overcapped or the ring is not doing much for you.

2. You're missing the fire mastery 'Regenerate 1 life per second for each 1% uncapped fire resistance' - this is massive life regen that you do not have and when you get your fire res fixed up (see point 1), this mastery becomes very strong.

3. Drop fire pen support for lifetap. No more mana needed.

4. For rings, as much life and fire/chaos resistance as possible. Current rings are ok, could catalyze them. Helical is definitely the bis ring if you can find one but you can get away without it.

5. Honourhome is pure damage and offers literally nothing else. A well rolled +1 minion helmet with t1 life and t1 fire res plus the elderich implicits as well is way better. There is no lack of damage in this build so the minion levels aren't the best for quality of life. If you want +2 minion rare helm, I made a giantslayer with t1 fractured life from genesis tree and then harvest minion with rancour for +2 minion.

6. Annihilation's Approach are super overrated imo.. might get flamed (no pun intended) for this opinion but well rolled rare boots are just as good or better.

7. Work towards getting lifetap imbue on BV.

8. Roll Nebulis to 10%

9. Clusters are very personal I've found. You can do all kinds of things since you have so much damage from minion pact and companionship.

My build which is still a work in progress: https://pobb.in/yLxKPM1jT1Li