I guess something basic and cheap to gear up like:
http://www.pathofexile.com/passive-s...HbkjjB8_F2M3Y=
Just an in your face Freezing Pulse Templar with decent defenses for most of the game. You'd rely on quest gems [easy to level/free] and mostly armor + energy shield gear. Also easy to work with and relatively cheap for a Templar.
Pretty flexible too. Easy to add more dex or str as need to the above build. Should be enough int to push through most of the game with no worries. Yet still have options open like dual totem, no totem, battery or full ES with regen.
Should be pretty straightforward.