It's a great pvp godstone imo.

Worth hanging onto unless you need the kinah to improve your gear or what not, then you can just pick up a cheaper godstone from the sale of it and still have enough kinah to improve your items. (+10'ing etc)

Sell it and buy silence godstone. Para is not as good on a templar, since when you knockdown it gets them off paralize. On the other hand, when you knockdown with silence it makes them not able to stunbreak, and you can roflstomp them with breakpower and stuff.

So yeah, sell it.