said by TheBionic:Cleave doesn't seem to go up after I level it, even though I have two support gems attached. What am I missing?
If you go to the wiki, they have the leveling charts on a lot of the gems. If you are using a skill gem you think you will be using for the career of your character, it may be worth the 5 minutes to do some research and check these charts out.
For example, Cleave is 7M (1-5), 8M (6-10), 9M (11-15), & 10M (16--). So, if you are already starting to get into some mana management issues, leaving Cleave at 5 or 10 for a while longer may be a good idea.
The big ones that get you in trouble though are the damn mana reserved gems. Those are party gems though and a well built party with a cross functional set of auras is a HUGE help.