Another class i think should be added is the druid that would use plants, the earth and healing magic. Maybe the druid can even bring out lava from the earth. As well if they can heal they can take away life from their enemies.
There can also be a class that uses the shadows to attack there enemies and possibly be on that can make shadow weapons as well allowing for long range and close range combat like the blood knight. Can possibly called shadow master, shadow dancer, or dark riser.
Another class can be a shape-shifter that can change there hole body or just their arms or legs or head/mouth. Either changing their limbs into animal or hard objects/weapons like metal or diamond. Can be called a shape-shifter, body morpher, battle shifter, also morphing or shifting weapon.
I like hybrids so a demon, human and angel mix would be awesome too.