If you only have one, it's gunna be hard to get a chain. If you have two, it's a bit easier. What you do, you use it, then you press whatever button corresponds with the quickening you want to use. If you can't use any, press R2 to "shuffle" them. This gives you a chance to use another one. And if you EVER have a chnace to use a mist charge, USE IT.
Good bye everyone, it's been fun!
Special thanks to ED_, superman4u, and Cross Stinger
Credit for the Siggy goes to shadow slayer