Destination: Mirror of Lyss.

I just recently traveled from Lion's Arch to Nightfall, premature i know, but I am in search of that nifty Elite skill, Charging strike. Now here is my question, without wasting too much time, and without screwing up my entire Elonian experience, how can I obtain this skill? I mean I know where to get it, just whats the most straight line path to get there.

Pay or ask someone to run you to Kodash Bazaar after you get to Sunspear Sanctuary.
Or
Unlock the skill with balthazar faction, then learn it using an elite warrior tome.
Or
Play through the campaign and get there the usual way.