Good thoughts on initial post. Some other helpful bits would be
1-where you plan to farm
2-what player setting you plan to farm at
A5 Merc would work for lawbrogner and decrep, freeing up a hand for grief/oath for you. But a2 might with reapers is probably better on paper, especially for higher players settings
I prefer gores over gobs. No frw is, but maybe less bad since while playing you should be at frenzy speed
Lawbringer is nice to bring down enemy phys resis with decrep, but cmoon is not that strong of a compliment, you will want a stronger weapon on that other hand. Maybe it's ok on p1, you'd need to test it out, but on higher player counts you simply don't have enough damage in this build to efficiently take down the last 1/2 HP after static does its thing. Remember static is sexy on a sorc who usually deals 10-50k DMG on another element, once monsters are reduced to 50%hp in hell