| Leving
If you would like to use mods try Kanes Spells or Kanes Rings. Spells in XP range from 1k to 100 Trillion and from 1 billion to 100 trillion you can reach max strength in just one hit. If you want higher strength try highlevel900. This mod causes strength to reach 909 but not one point higher. And if you use this any armor or weapon that increases strength by one will cause a loss of 9 strength. If you don't want this issue try leveling to 300 mod but you stll take damage with this mod.
If you use mods you may not beable to join other game nor have anyone join you.
If you want high level in one game play as a single player. | 
Linear Mode
