I've done the game before with a mod that ups the number of companions you can have. I focused my character on non combat skills; blacksmithing, enchanting, alchemy, restoration, alteration, speech and so forth and basically played by outfitting my companions with stuff and letting them do the fighting. Pretty fun in it's own right but for a character like that you need to have a secondary character for when you're in the mood to kill stuff yourself.
Of your 3 options I'd pick the first two. Unless you use a mod to make spells way better a spellblade is pointless as you'll quickly find that your sword way WAY outdamages your magic. If you want a magic fighter I'd suggest concentrating on buff spells and/or summons' that you can cast before engaging in battle and then just use 2H/dual wield/sword & board to do the actual fighting.
Spellblades are awesome in theory. So is destruction magic.
It seems Bethesda doesn't like theories.
I downloaded a mod that made destruction spells scale more sensibly - I don't remember which one it was, but it definitely was not one of the big ones. From what I've heard the big ones just make things unbalanced besides also adding a whole bunch of stuff I'm not interested in. I'll suggest finding one of the smaller ones that focus mostly on balancing destruction - it really helped me, and I'm more or less doing pretty well with the spellblade combo thingy. Fling fireballs at them to soften them up, then go in with my sword and shield when either I run out of magicka and/or they get too close.
I like to think of myself as a 15th/16th century musket-wielding soldier. Well, except with fireballs instead of muskets.
I have a mod that makes spells scale better but not as much as I'd like. My game is actually unplayable till I get Dawnguard so yeah that's a thing.
I have a mod that makes spells scale better but not as much as I'd like. My game is actually unplayable till I get Dawnguard so yeah that's a thing.
Why is it unplayable?
Dude, TES is so many times better if you pay attention to the lore. I found that our myself during my second playthrough. The story is what makes the TES seriea so great.