Celtic Heroes

Hello fellow rangers! And snoopers from other classes. I use rapid shot and I find it pretty effective. Inturepts skills good and helps for dps. But I am upset at the cost of it. Mine is 30/30 and costs 144 energy!! Insane. It also lasts for 20 seconds. So I'm a I bit upset. I think it should either cost less mana or last longer. It costs more than my 34/30 bolas which is way more effective.

Any thoughts and comments greatly appreciated. Thanks!