I think the Cleric should be rolling to Turn, not the Undead to save, but just 1 check - ust as in 4e having the Wizard roll an attack vs every fireball victim is clunky. Here's my approach:
Turn Undead: 1/short rest
Action: present holy symbol. Roll a single d20+WIS+Prof attack to Turn, opposed by all Undead within 30' passive WIS Save: the roll must equal or exceed 11 plus the Undead's WIS save bonus). If succeed, Undead you can see within 30' are turned, fleeing for 1 minute (PHB 59).
Turn Undead DCs
skeleton 10
zombie, ogre zombie, ghoul, ghast* 11
wight 12
beholder zombie, will-o-wisp, wraith 13
vampire spawn 14
vampire* 18
It makes Turning slightly more likely on average, at the risk of catastrophic failure with a low roll. I think this fits the source fiction.
Turn Undead: 1/short rest
Action: present holy symbol. Roll a single d20+WIS+Prof attack to Turn, opposed by all Undead within 30' passive WIS Save: the roll must equal or exceed 11 plus the Undead's WIS save bonus). If succeed, Undead you can see within 30' are turned, fleeing for 1 minute (PHB 59).
Turn Undead DCs
skeleton 10
zombie, ogre zombie, ghoul, ghast* 11
wight 12
beholder zombie, will-o-wisp, wraith 13
vampire spawn 14
vampire* 18
It makes Turning slightly more likely on average, at the risk of catastrophic failure with a low roll. I think this fits the source fiction.
