ShiKage's Infighter Build

Hi guys, just wanting to ask, does energy orb replace energy buster at 4th job? If so, can we just leave out energy buster from our build?

Yes it will. However, it won't really replace energy buster until the skill is around lvl... 13 when it can hit 4 enemies. And you won't be putting points into energy buster until you're 15x-16x. It's an awfully long time to go without an energy using, non-transform skill.