I might get flamed for this, but given the last of replies, I might be safe. It is very hard to build monk to effectively kill T6 Ghom.
My monk was never geared past t3 but I'm familiar enough with the fire build to know that it's about consistent small dmg instead of quick burst (necessary for t6 Ghom). Sure, you get some burst with LTK but nothing close to the 160m+ I get on my Roland bash sader.
This is why I no longer play monk. Hopefully someone posts a solution because monk was my first class and I'd love to resurrect it.
My only suggestion is to drop down a few torment levels if that's what it takes to up your gph.