I do feel a bit of a numpty for not saying what other powers I was planning on taking in its place. I'm just too used to WoW, where everybody has the same skills and cookie cutter builds ><
From that though, I gather it isn't entirely blasphemous to not take it, but it does seem to make life easier if you do.
Looking at my build, I think I might take thunder kick, just to make the first levels that little bit easier, and then I should know a bit more about the game, so will hopefully be able to apply some extra judgement there.
Thanks for the help though!