Hmm..don't know of anyone who's gone ice force bow...you'd be the first
I'd wear protector-you get some of the bonus to speed and mana, and since you're hybrid, you can raise both your defenses equally. With more in INT, later mobs are going to kill you quite fast: Wearing garments, most don mobs did roughly 100 dmg per hit..since I am STR based, it's not an issue, but if you're more int based, getting hit by 2 or 3 could mean death quick.
Also, don' tuse self heal. Ever. Healing hand does more HP for MP, and you can heal others with it. Don't forget to get the ice skills that give you bonuses to defense: every little bit helps. And if you feel like spending SP, lightning's grass walk should be a required skill in ALL builds.
I'm not sure if you plan on getting nukes later on, but if you're int based, you should. They're how int builds do most of their damage. If so you're going to have to raise lightning and fire as well. If not, and you want to use bow skills, raise your strength, as that's how bow skills do their damage. 18 levels isn't too bad for a reroll, but if you're going to do it, do it soon, before you invest too much time into the char.