I think you need to give them a lot more options - right now, this monster could be pretty easily handled by a decent level 7 party. Maybe less. Reckless attacks are almost always a huge disadvantage for a BBEG because they generally take a lot more attacks than they dish out. So basically this Aspect of Mephistopheles is just a tank'n'spank. Barbarian, druid, fighter or paladin in the front to soak up that damage while everyone else goes ham. Easy peasy, over in a few rounds.
I assume that's not what you are going for, so in addition to their melee attacks, I would give them some kind of supernatural movement so they can't just be pinned in place and beat down. Probably a legendary action that lets them blink around the battlefield, with a suitable poof of brimstone. I would also give them some kind of way to attack at range, probably an AoE. And a flight speed. Dominate person? Summon demon?
It's aspect of Mephistopheles - it should have all kinds of tricks up its sleeve. This version is more like a demonic barbarian. He's even kind of dumb, for an aspect of a demon lord (I would have thought of Mephistopheles as a devil, BTW).
Coincidentally, the Monster Manual Expanded II has one... maybe take some inspiration from itIs this a balanced enough for a CR 15 creature? If not what shoul i change
This a serious misunderstanding of how the DMG guidelines.So, I'll be the first to admit that even though I create custom monsters on a fairly regular basis, this is one of those things I hope they revise for the 2024 edition, because the instructions in the DMG are a bit of a mess. I mean, if you went by the DMG - AC 18, HP 281-295, Attack Bonus +8, DMG/Round 93-98, Save DC 18. None of the monsters in the published books seem to match that.
For the most part I ignore that chart and base my monster designs on other monsters as I was showing.I think pointing out a misconception is useful. However, I am not a DM and not a monster designer, so I can’t help much in that department.
It has been discussed on these forums many times and if I wasn’t on my phone I would track down some links for you. But your misunderstanding of the DMG has been covered many times. The best I could do at the time was point it out. I don’t see spreading misinformation as useful, but pointing that out was and is the best I can at this time.For the most part I ignore that chart and base my monster designs on other monsters as I was showing.
Telling someone they're wrong without being able to explain your reasoning is not useful in any way. Not to me, not to the OP, not to any other DM who might be looking for advice. It's just a random put down "you don't know what you're talking about".
What's the point of posting if you don't know what a better option is or how I'm misusing the chart? Why bother if you have absolutely nothing to add, no insight into how things can be done better?
Telling someone "you're wrong", especially about something like this that supposedly fairly objective is not helpful to anyone.It has been discussed on these forums many times and if I wasn’t on my phone I would track down some links for you. But your misunderstanding of the DMG has been covered many times. The best I could do at the time was point it out. I don’t see spreading misinformation as useful, but pointing that out was and is the best I can at this time.
Edit. I could summon my DM, and will do so if you want, but they are recovering from surgery.