For Sage Skills in Ragnarok, study 5 is a minimum. So if you are on higher levels Ro Zeny if you can afford it, but usually spreading out across the Endows and the area enchants will thin your options too much to get this higher.

But you need to know that Cast Cancel 1 is enough. The point of Cast Cancel for normal sages is to allow a sage to cut a spell short, save some SP, and either cast another spell (perhaps you cast the wrong elemental bolt, or perhaps you need to cast FW because something dangerous has just appeared and threatens to kill you) or run away (because let's face it, as great as walking and casting is, it can't compare to running away with Inc. AGI. Especially since Free Cast is absolute movement speed, not relative). You need it to get Free Cast though.

Then do Free Cast 10, bar none. Unfettered attack speed and moving as fast as you can is a must for the battle sage on the war path.

There's a positive and a negative side to this though. The positive side is that you can move a LOT faster while cursed if you cast a spell (and a fast moving grim reaper can be fun and freaky). On the negative side, speed buffs like Inc. AGI (and likely Moonie shoes) are negated while you're casting. It's a half speed drop. We provide ragnarok zeny for you.