So, I should archer at long range, dual wield destruction at mid-range, and dual wield one handed at close range?
It's really whatever you want to do. Destruction/Archery is good for long range, destruction is fine for mid-range, and at close range I'd use a sword in one hand with destruction/restoration in the other.
I can't imagine you being able to say conjuration is better than lycanthropy when you've only tried conjuration. A personal army does sound...epic. Next character then! Augmented SOUNDS pretty awesome.
If you dead thrall NPCs like Orchendor (alone one of the strongest NPCs in the game), there's not much out there that's going to be able to compete with you; plus you can even have TWO thralls. Conjuration is easily one of the strongest skills/perks in the game. Even though I don't have Dawnguard (and thus can't try Lycanthropy perks), they're really pretty "meh" just looking at the stats. Not worth it IMO unless you want to role-play as a Werewolf.
Augmented sounds awesome, but chances are you'll want to use more than one type of spell depending on the situation. If you enchant armor to get an unlimited mana pool, investing a ton of perks to increase the damage of just one type of magic isn't really worth it.