I wouldn’t recommend going for 2h Cadence build - it won’t be reliable. Markovian Advantage is good dual-wielders but bad for two-handers and vice versa with Zolhan, it has to do with weird animation issues and the fact that Zolhan only hits with one hand.
About 2h devo tree, check out my “The Big Bad” build, I found a pretty efficient devo tree there.