Come on, the cloths map is not an acceptable option for playing even on low end systems.
Truth is: the game is badly optimiziable atm - thats all to say.
It just runs badly on most systems.
Needs some more patches 'till it will run in a playable fashion.
For now it's just a unplayable mess for all low enders.
My workaround: save&exit&start&load every 30-50 turns and try to end the game before turn 300-400.
Sadly the game tends to "alter" the saves and "forget" some units, enemy chars, etc.
but who cares... it's still totaly addictive and after 1.1 it has stopped crashin' every ten minutes.