Ok so i have 2 suggestions for sadhu
1st: WE all know armor break reduces enemy armor to 0, and there is no “magic defense break”, so i suggest giving sadhu the chance to fill this hole, As a Soul master, he should be able to break his enemies soul (reduce MDEF). I would personally either add this as an Attribute to OOB (when you hit an enemy) or to Vashita Siddhi.
2nd: Transmit prana feels underwhelming since it’s based on caster status points, and no sadhu is gonna go full str, full dex, full int, and having a linker 3 100% off the time ain’t really favoring anything. I would reccomend chaging the skill to:
"Transmit prana increases an ally Status by 10*skill level %. " Similar to monstreance with DEX, but with a higher value and any stat. This would make the skil actually useful.
You could chose the Status with the already existing attribute, and the sadhu would then be a class able to buff anyone.