You should have 105 faster cast rate and 75% resist all. Also, you don't need that much str, and I would not bother with max block so no pts into dex needed either.
You can keep most of your gear, only need to swap out a few items:
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My gear:
shako
occulus
CoH
stormshield -> Spirit shield 35% fcr
frostburn -> Magefist
war traveler
arachnid
maras
2x nagel
cta 5-3-1
You will also need a few fire resist sc's to reach max fire resist (unless you have torch & anni).
Regarding stats, since you wont need dex for max block anymore just follow the usual distribution:
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stats:
str - 156
dex - None
vita - The rest
energy - None
For your merc you should change his gear to improve his offense & defense:
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merc:
insight
shako -> Gface or Andys or Vampgaze
shaftstop -> Treachery
Also be sure to have 1pt into energy shield. With these adjustments you should do just fine