This removes the ability to have Stoneskin prepped and cast and also run CC or any of the other higher slot spells listed without dumping the concentration on another spell. Primarily having mage armor prepped when they are wearing Breastplate, and having a majority of your spell list require concentration. Good luck and have fun!Īgain, not sure where you were headed with this BBE when it was created, but your spell list might deserve some consideration. My opinion is just that, an opinion, not a requirement. If the inconsistencies I pointed out were intentional, fair play and disregard any or all of what I provided. Also, there are some other inconsistencies with things like your spell attack modifier and spell save DC that don't match with the normal calculations for those stats.
If you pulled from a couple different monster statblocks, I'm not seeing the synergy that you do with them. Again, not sure where you were headed with this BBE when it was created, but your spell list might deserve some consideration. If you are going for something like a bard or Bladesinger or Arcane Trickster, then I might suggest building the character that you want and run them through the CR calculations in the DMG - Creating Monster Stats. I might suggest that you decide how this BBE will interact with your party. That would net us ~340 Damage / 3 Rounds = ~113 DPR which scales our average CR up to a 12. CC comes in at ~42.5 and two rounds of upcast 4th LVL) are ~42.5. DPR for the spells listed is potentially a little gonzo if we assume two targets hit and the first three rounds of combat. If magic is the primary means of combat engagement then we get up to a CR 8 just using the Spell Save DC alone. That is using the corrected HP and To-Hit numbers addressed earlier. If melee is the primary form of offense the CR will land around CR4. Looks like you have a couple ways to run this and I'm not sure how the primary means of combat would run for this monster.
There are some other choices that I'll touch on later in.
Also, the To-Hit Bonus for the Rapier reads a +3, which should probably be a +4 if you include the DEX modifier in the To-Hit. You HP calculation also lists (13d8+39), which would correlate to a +3 CON modifier for a level 13 monster. Couple things to note, your HP calculation seems to be a bit off for the average HP.