Is my Dracarris build not viable enough for you? I already mentioned in that thread that I was surprised that I was able to proc it, even if it was sporadic.
The larger problem for these types of builds is that the synergy is off elsewhere. Pyromancer is not really a viable pet option anymore because the class doesn’t provide pet resists and the items that give Flame Touched bonuses also don’t give pet resistances either (like the Magi rings that convert pet damage to Fire). The offensive power is fine, but we have no way to keep the pets alive.
I have already listed the reasons why Chaos Reap Spirit with the Black Scourge weapon isn’t viable; if there were more items that gave bonuses to Reap Spirit while giving the player Chaos bonuses, then it could turn out to be a good build. I hope something is in the works to make Chaos Reap Spirit viable.