Hey, I'm new in this game and I'm levelling a sorcerer now.
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However, this leads me to my next point. While leveling your character, it is not so important to find the best rotation, as that will change over time with balance changes and gear changes, but to get all your Class Skills to at least the Morph stage. So, slot all your skills to get them leveled at least to the morph stage, even if your not using it actively in combat. Most situations can be handled with a 2 or 3 skill rotation, so you don't need to have every skill on your bar something you actively use. Or, remember to slot the skills you are leveling before you turn in quests. This way, later on you can change your build without grinding.
Once in the VR Ranks, then you start to worry about the most effective rotations.