Need some help planning the future.

Dear fellow templars. Currently I am a fireball casting magelike persona with the following specc:

http://www.pathofexile.com/passive-skill-tree/AAAAAgUABLMFQgVbFE0abB8CKU8snDbFNtg8BUGWRtdJG03YWK5bWWBtZk965n1TgUmBb4IQgpuDOIdli4yMdo9Gm6GcLZ2Ana6ePJ-0n9-iAKcIrrOvt7I4tobQ0NR82CTd89-w4XPkIudq7FXtIO988B_xbPfX

Together with it works wonders up until act 1 merciless.

Currently I am doubting very much what way I should progress.. I could spend 9 points for more defense with the following path (and spending my remaining future points on dps): http://www.pathofexile.com/passive-skill-tree/AAAAAgUABLMFQgVbFE0WQBpsHwIpTyycNsU22DwFQZZDY0bXSRtN2FiuWPVbWWBtZk9mnnFNeuZ9U4FJgW-CEIKbgziFfYdli4yMdo9Gms-boZwtnYCdrp3EnjyftJ_fogCnCK6zr7eyOLaGtzHQ0NR82CTd89-w4XPkIudq7FXtIO988B_xbPfX

Or more offensive (and spending my remaining future points on more defense): http://www.pathofexile.com/passive-skill-tree/AAAAAgUBBLMFQgVbEmkUTRccGmwfAilPKo0snDbFNtg8BT1fQZZEq0bXSRtN2FJTVa5YrltZYG1mT3F5euZ9U4FJgW-CEIKbgziHZYuMjHaPRo-ml4WboZwtnYCdrp48n7Sf36IApwius6-3sji2htDQ1HzYJN3z37Dhc-Qi52rsVe0g73zwH_Fs99c=

Please people, your advice and suggestions are more than welcome. At the moment I'm really squishy, but I am afraid that future acts will require way more DPS.

Thanks in advance.