I found that in the early stages of the game (where i am at now) using the bound sword and flame atronach is really useful while playing as a Conjuration Warrior, who uses Atronachs and Bound Weapons to help them in battle. however, i know that it will get very hard later in the game, and i want to know some good tips for a Conjuration Mage.
I know that if you can get to Conjuration 90, you can talk to Phinis Gestor and complete the Conjuration Ritual Spell, which will allow you to but and use thralls. However, my Conjuration is only 40 and will take me a lot of time to get there. (same guy that started the discussion, i Started as a Breton and leveled up Conjuration and one-handed a lot at the start of the game. just completed the Whitrun mission and am going to Bleak Falls Barrow)
Bound weapons do become redundant late game. If one handed is going to be your only focus, aside from conjuration, try to level your smithing too so you can increase your weapon damage. Conjuration is suitable at any level.
I planned on working with one-handed and a bit on archery, but also going with an atronach assist. I recently made the storm atronach spell tome and am planning on using it as soon as I can raise my magica level.