Board Thread:General Discussion/@comment-25368793-20140831032453/@comment-1466854-20140915050212

Unless you have something to gain from unleashing a skill early, wait until your bar is full. Also bear in mind that if you're using a damage skill and it kills something, while that target is doing the death animation you can queue another skill without freezing your action bar. Fair warning, I haven't tested if that's true of a bar already in motion, but I assume it only works if the spirit's action bar hasn't begun moving yet.