Jack Daniel
Legend
I'd use Dweomer in an achetype called Dwimmerlance, the swordmage using pole weapons. Its kinda close to Dwimmerlaik and sounds cool.
"Dragoon" would be less of a mouthful, and it has a bit of fantasy precedent.
Part of the problem, of course, is that we're trying to coin a neologism for a concept that has no deep, resonant name in folklore and mythology. The archetypical (in the campbellian sense) great warrior-hero is often a great magician too (Odin, for example). The strict "fighting man / magic-user" split is an artifact of sword & sorcery literature, but it's deeply ingrained and difficult to overcome.
I think it's going to be very hard to do better than "gish."