D&D 5E (2024) Can A Spell Caster Out Damage a Martial Consistently?

[Mistwell]

Ok maybe I am remembering wrong, I though Treantmonk said he was priamrily using Greatsword for Graze, but they could use Longbows as well when they were not in melee range.

He said the numbers hold up regardless of what weapon they use, but they default to longbow. Bow hits more often but does less damage per hit. Greatsword hits less often but does more damage per hit. They average about the same. Strategy was spread out so they don't all get hit with an AOE if possible, and fire bows all at the same target until it drops.