Aion Guide: Multifield Attack by the Staff
Maybe that is hard to say when to upgrade Cloudy in Aion. While at lower levels there are much better places to spend your points. You can put one point in it, and you can at least hit things that are two steps ahead of you that handy at times.
The main reason you can not leveling (Aion gold) Cloudy right away is that it you only get +1 damage with each successive level, and +2 damages at level 5. +1 damages may be a big deal when you have an Int over 200, but when you're just starting out it means next to nothing. Pay more attention to your defense before you worry about your offense. Feca is the only class where this line of thinking works out.
This lineup costs 22 to 26 spell points, so chances are you won't want to raise Cloudy until you are at least level 27. Even then, there are more fun spells coming your way. This is just from a guy who thinks Cloudy is overrated. If it wasn't linear, and if it had higher min damage then you would be all over it like white on rice, but then it would basically be a fire Bramble. Lol Staffs do better max damage, much better min damage, and don't cost any spell points. Only when your Int exceeds your Strength and Feca bonus with staffs by leaps and bounds will you can switch to Cloudy.