If a kd spends a lot of time warring ud tact > merchant and I don't think its even close. What kind of tpa and or WTs / rax are you ending up running with merchant? I completely agree with tadpole's assessment that divinity is an outlier where merchant can be used to greater effect then the majority of the server. You have more pump time on bigger acres with beneficial cfs and a strong surrounding kd allowing lower draft, and provinces like this will be properly positioned in the kd. Most other places it will be a really weak choice. Even in divinity I don't think it's optimal.
I also support orc clerics, you really need to keep your army out all the time and you will have a hell of a time replacing losses without cleric. In war you need to remain threatening post 24 to 48 hours. No matter what noobium spouts orcs need some sustain. Warrior would be my second choice on orcs.