It’s very difficult to balance your build for both TBL format PvP and World Bossing because you want INT for World Bossing and CON for TBL. Transpose is pretty good for helping with that, but it’s inconsistent.
For example, your Transpose will likely be pushed off without Daino. You might not queue with a cleric, so you can’t take advantage of Transpose. In these scenarios high CON would be better.
In gameplay, your only game-changing skill is Reversi. The current meta is Wiz3Linker, usually paired with Sorc and/or Necromancer, and Kabbalist/Oracle. There’s not many skills you can actually take to change the pace of the game if there’s no Psychokino. And even if you do take Raise, there’s plenty of Oracles to counterspell.
If you want PvP commentary on RCWL, I think it could do fine. However, with Thaumaturge you likely won’t enter top 20.