after u do the quest where u save ur mother and kill the kraken, well, go back in there to the cliffside path, there should be infinite respawn of the undead, use physical sheild (by the way, make sure u have some will potions with u) and your combat multiplier will not go down.
I got my CM up to 250 when i got max general xp (took me about 10 mins)
K, I know there r heaps of posts that have this in it, but i am just putting it in anyway.
first have full guile then go to all the main towns that you have axcess to, by all their gems, go to a shop, (oakvale best, i think), then sell all of them to the shop, by then back, sell them,by then back, sell them,by then back, sell them,by then back, sell them,by then back, sell them,by then back, sell them,by then back, sell them,by then back, sell them,by then back
