Help with BB/BF CHIEFTAIN

I mate,

sorry for my english first..

I'm playing with a BB/BF chieftain, now level 92.

Everything was great until today when i started to map T15/T16 with goo juice.

I play on PS4pro, so we started last one week ago and for us is not easy to find all the masterpiece like pc trade, but it's a relative problem.

The worst problem I'm having right now is with mobs dominated by sirius, that even after the nerf can be quite hard and the maven bosses with "fight longer", but even with 10 milion DPS these longer mean forever...and in the end the portals are getting over..

I decided to convert in fire 90% of the physical hit, with a 84/85% fire resistance, i was thinking to have a very good defence, with 6 endurance, a lot of block..and in heist level 83 is just fine, even the map clear is quite fast.

What can i do to get better?

Is 90% of fire conversion to much?

Thanks fo the advice

here is the pastebin

https://pastebin.com/TNjTxBDY