Then don't suicide attack . Don't be afraid to sacrifise some siege units. And try to promote your starting Infantry or Elephants with City Raider. Try to attack ASAP. If you bombard the defense bonus of the city away, an Infantry has about 40-60% winning chance. (needs to be verified) If you promote them upto CR3, it can easily raise above 90%. And even if you loose, you can try again 1 turn later (and repeat several times if necessary). Sometimes your are lucky and sometimes your not. But if you don't try, you'll never have a chance. Why does the Khmer need a Hindy missionary if you can get it from Indrapura? Do you mean a buddhist missionary?