Need help with Fighter build

Currently a level 45 Fighter, having second thoughts with my skill build.

I decided to give up the skill that raises the power of Power Strike and Slash Blast, and go with Ground Smash. Just to make sure, is this the right choice? Or should I be doing something else.

Ground Smash first, and I believe Final Attack following it would be best since Ground Smash is your primary attack skill. Unless you're actually training with, or intending to train with Slash Blast would I recommend you put into Improved Basics before Final Attack, but I'm not that far yet to tell how useful either is. By now, you should have maxed Mastery and 5~6 Booster as well though. It really depends on where you are because Ground Smash is only used on mobs of 3, and any more should almost always be Slash Blasted.