Recently got ACN to 50 and did the level 50 job quests for both SMN and SCH.
It is certainly faster to get a party on SCH, and I have had no issues running 4 man dungeons with it so far; just unlocked the Keep, though, and have yet to try it. Never had an 8 man dungeon with 2 SCH, so I don't know how that would go.
I did 20 INT and 10 MND. Like others, though, I may change that. It would probably be a swap for me since my character is a Duskwight Elezen, which naturally has very high INT. CNJ gets several Enhanced MND trait boosts, along with no problem choosing where to put their attribute points. That alone gives them a big advantage in cure potency.
My dilemma now is choosing which relic to do first. Part of me feels like I'd get a bigger advantage from the Veil of Wiyu, but there's definitely a lot of utility to be had in the Omnilex given how much I run on SCH. Either way, need to get cracking on Alchemy :D