I made him Shadow monk 6/ thief rogue 4/ spore Druid 2 and he soloed half the game for me/
Cloak of shadows + shadowstep guaranteed that we always surprise the enemies, his stun strike takes out every thougher boss, he has stealth + straight of hand from both rogue and monk so he could steal everything with ease and with tavern brawler he just bare handed slaughtered our enemies.
Works perfect RP wise , he felt a lot like Daemon from Vampire diaries , being able to teleport to someone then snap their necks lol.
And then become invisible with cloak of shadows like a true vampire lord.
With 2 bonus actions he can get out of any trouble by hide+ shadow step away, and overall this build was amazing .
With spore Druid he also got extra nercotic damage to his attacks, and able to cast guidance , and then at act 3 got haste spores from the armor of Sporekeeper
Absolute blast playing him this way