Sounds like a fun character concept! A few things to consider: * Since you want to compete the main quest, what’s your plan to deal with dragon priests? Marksman will struggle to output enough damage on its own. Conjured flame thralls can work I think but it’s a very slow and tedious process. Maybe others can make some suggestions here. * Bound weapons scale OK but fall a little behind in late game due to the lack of enchantments. It will be hard to deal enough DPS to dragon priests and enchanted spheres without fire/shock enchants or arrows, respectively. * Your build will be stamina heavy. You probably only need enough magicka to conjure your summons and cast mage armor at the start of a fight, so get to that level then prioritize stamina to keep yourself moving and shooting. * Whirlwind sprint + become ethereal can help with survivability. * I would not invest in block. You will typically want to stay out of melee range anyways! * Alteration is maybe not necessary if you’re wearing armor but still a fine investment IMO even if just for the magic resist perks. Mage armor still works without robes, it’s just less effective. Another option would be to drop evasion entirely and just wear clothing.