Keep in mind that Timeless itself scales with creation and intellect. I get +8 turns from it with 40 intellect and creation 3. If it weren't for the fact that Rune Mages exist Creation and Timeless would be competing for the Most OP award. Just spam buffs and make them last forever. Runic Word is more than powerful enough to utilize Timeless indefinitely, even without Higher Magic you'll be able to use Timeless for 3 rounds before needing to use Runic word once.
Stone Skin + Divine Armor + Avenging Angel on any unit and you can just wait around while enemies kill themselves. Who needs to attack?
. Keeping Avenging Angel/Mana Spring up 100% of the time isn't too hard once you have a strong enough Timeless unless you are against 10 ranged stacks or something (in which case, go ahead and attack
). Only downside is that stuff like Burning and Poison get buffed by Timeless as well. Hey, this is where Negation can be useful I suppose... Not that you really need it, but might as well cast it.