Heretic of The Seventh Circle
The aegis is just a magical field of protection, in this case for my Athamir class it provides an AC calculation and a mark. The mark has a basic effect, based loosely on the DMG optional marking feature. Then you can spend “Aether” to ramp up what the mark does, and certain features either work against a marked creature or do more against a marked creature.i think i'll jsut add the magic damage at first, the three subclasses at 3rd kinda cover that latter bit in my swordmage design, Bladesmith is meant to be a skill/versatility build with extra spells and maneuvers, Rune Knight is meant to be more reliable and defensive having access to better weapons and armor and defensive abilities, then Arcane Sniper subclass is the ranged option
do you think it would be better progression to move forward the level 14 affinity resistance ability to 8th and put natural force/divine/necrotic damage access at 14th instead?
that does sound interesting having their mark include other effects beyond a pure damage bonus like the ranger's or warlock's, personally i wouldn't put it at 1st let them play with it just for a level or two before needing to choose what to specialise in, i'm not someone who wants to decide all the choices for my character as soon as possible, as an aside i don't actually know what an aegis is/does, i've seen it referred to a few times and from context it seems to be an ability from a previous edition but i have no idea what it's actual effect is.