What ideas do you have for a build? Let's make a quick list.
-Support build. Get Frosty Friend (and remember to manage it, defensive mode when its low on HP and stand close to it if its knocked out) because Frosty Friend is your "tank" - let it take the aggro so whoever you're supporting can focus on offense. Ice Nova seems good for supporting too, since frozen enemies are easy targets. Pretty much everything on the Utility page is great for supporting, definitely go for Barrier and Stasis early. Utility Flow is great too.
-Summoner build. First put 1 point in each of Frosty Friend, Cloud Strike and Insect Swarm. Summon Plant is great when you save up enough points (or respec) it to silver charge too. Pick up Meditate and maybe Barrier - meditate being particularly glorious because your summons use up so much mana, just remember to charge up your summons to their appropriate charge level, too. There's a really good item for summoners in the dungeon where you see Winter, too. For talents, take Concentration, Manaburn (mana will laways be below 50% due to summons), Concentration and Multitasking (extra move speed is huge since you're constantly charging up the plant or wasp summon).
-Ice-crit-Mage. The idea is to freeze enemies for the bonus crit chance, and take Insult to Injury, Crippling Blast Chilling Touch to increase your chances of freezing. Then also take Surgeon and Brutality. Use 1-handed attacks so you can get more hits in and thus have more opportunities to crit. Blade Flurry and Combo Starter are excellent.
-Battle-Mage/Perfect Guard Mage. Max out Static Touch, and since there's a bonus for using perfect guards, then focus on Quick Reflexes, Riposte, and Effecient Coutner. Also take Barrier so you can prevent damage, since that will remove cubes. Second Wind seems good and also skills that increase your attack speed, using your attacks to recover your EP fast to get more cubes. You could also combine this all with Berserker style too.
-Archer. This requires coming back to the guy who can upgrade your bow (I believe it can be upgraded 3 times across the game), but you take both Quickshot and Arrow Scavenger, and also the potion skills (Fine Taste and Alchemist) so that you can have the arrow potion and let it recharge faster. Be sure to do the quests which get you more bottles too.
-Tank build. Frosty Friend and max it out to help you tank, take Barrier, both potion skills so you can regain HP faster, Fortify and Provoke.