Multiclassing should be a choice you make for building a specific character. Whether it's another base class or a prestige class, you should never be taking it for no reason other than "It's just stronger". This is a major fault with many of the official made classes, and one that I strive to avoid. A base class should be worth taking 20 full levels in.
Additionally, if PrCs were made based off this class, they would likely include some form of heritage advancement.
Yes, they provide a lot of the power of the class. And while they're stronger, they still remain behind full casters in terms of power and utility.
Note that Protective Aura only applies against evil creatures. And while that will make is extremely good against say a necromancer, it'll do little if you run up against a back of animals, or a neutral thieves guild, and so on. Additionally, 10 feet isn't that far unless you're fighting in hallways, and severely reduces it's usefulness for maneuverability.
Also, you play a Bard instead of a Warlock because Bard fits the flavor of your class better.
Essences and Shapes often receive less love because they are just not as good as other invocations. Eight are available for 2 reasons.
- The symmetry of gaining an invocation every level flows better on both the chart and feels more natural, instead of having to remember that there are two levels where you don't learn a new invocation.
- This allows you to have 1 shape and 1 essence of each Least, Lesser, Greater, and Ancestry, so that each grade can get it's time in the sun.
There are two items that increase an eldritch blast's damage: the Warlock's Scepter and the Chasuble of Fell Power. The Greater Chasuble adds 2d6 to an EB, while the Scepter can, once per day, add 4d6. Combined with Hellfire Blast, you're getting +12d6 (at the cost of 3 Con) for the first EB, and +8d6 for every other EB that day.
Eldritch Volley only allows you to fire three blasts at class level 18, not character level 18. I will amend that to be more clear.
Added to the base 9d6, you're looking at 38d6 total, or ~133 damage (~247 for Demonic). By 18th level that really shouldn't be too insane. It's certainly respectable, but it's nothing mind-blowing. Particularly since that is just about as high as you can take that damage, whereas other methods, including simple melee attacks, can rocket up past that with the same level of optimization effort. Heck, an unmodified disintegrate dishing out 36d6 damage at that level, and you can bet that isn't the most powerful option the wizard has available.
I'm glad you like them! But every class should get things every level. Dead levels are heresy in game design. If you level up and all you're doing is increasing a couple numbers by 1 and rolling for hit points, you're playing a poorly designed class, full stop. This class is unquestionably powerful out of the box, but that is how classes should be - you shouldn't need hours of book-diving and intimate knowledge of the rules to make a class powerful.
Sounds like you got caught up on the damage capability of the Demonic lineage (which is it's main focus). It can certainly do some impressive things, but HP damage is easily replaced, and PO'd Power Attacking characters will still out-damage it.
I do admit that the class hasn't been properly tested, and the balance is only theoretical, so it's quite possible that numbers need to be tweaked. Thus far the only feedback I've had from actual play has been regarding the angelic lineage, and that feedback was very positive (even given the game had a very heavy evil focus).
I'm thrilled you took the time to read through it and respond. It's the only way the class will improve. Balance is a tricky thing, especially in DnD where people play at such differing levels of power. The triple blast is a new addition, and it may be too much. I'm not really sure how heritages are getting together to combo though.
I'd love to hear your responses!