When i click your "here" link it just takes me to this thread.
Fibofallfibs gave good advice. I dont really like summoning or know much but I have always been told to use the crimsons on the higher levels.
The only charms I ever used that were not crimsons were the 240 gold ones that you receive from the Wolf Whistle quest. That guide outlines everything, but basically, crimsons are the best charm because they are a relatively common charm and the give the second best experience. The best experience is from blue charms, but those are quite uncommon.

