[Uh-Nu-Buh]

It might be cool to use the current system of experience, but empower it a wee bit like this.

Example: Light Infantry with no exp costs 10gp and 5rp. If you paid 25% more gold you could have them well trained right off the bat (1 star). 50% more for veterans (2 stars). 100% more for elites with 3 stars. These costs are a first attempt and might be off. You're paying a premium for your unit, sacrificing future toughening, etc. It would probably only be worth it for your heavy units. Myrmidons, etc.

It would be easy to mod an approximation of this. Have these experienced warriors only available from your home province (tied to a site like War Academy or somesuch).

Tying in to another thread, it would tip the scales against magic even further.... Some definite pros and cons.