Zardnaar
Legend
Between the EK and the Bladesinger, I'm not sure how much design space there is for a mystic warrior who casts spells. You have a 9 level spellcaster with the same number of attacks as a fighter in the level range that 95% of games end at. It gets to sub in an attack for true strike/other cantrip so is already dealing more damage than just attacking twice. It has great defense in any fight that actually matters. What design space is there between this and the EK that wouldnt be OP or a chump class?
Half caster int based. Something like 4E Swordnage or 3.5 duskblade is lacking in 5E.
EKs good not so much at blending magic with weapons though.