Mabinogi: Ranks 21-28 For RvR
Ranks 21-24
At those Ranks, you can have the first mastery spell of any tree. Generally, Agonizing Torrent is bad for RvR (for now) and Seed of Chaos is ok but not something that will change your game play. So we actually propose you spec Havoc for these levels (Mabinogi Gold). The injury is a real strong spell. In fact, it is a strong ability to any type of team. As long as the focus on the application in every cast you see and use your typical Council as dangerous. At these levels will be in your Tor Anroc, it is wise to avoid close specifications, unless you have a reason to do so.
Ranks 25-28
You can now pick the second spell of any mastery tree. All three second mastery spells we get are pretty good. However Demonology is still a weak choice for RvR and Havoc, as we have said earlier in this Mabinogi guide, does not shine until much later. So, in our opinion, best thing to do at those Ranks is to focus on changing. Indigo Fire of Change is actually your best DPS at those ranks and Endless Pandemonium is a pretty nice tactic.
Just remember that, while it can make you top the DPS easily, just spamming DoTs is not really a good option as a Magus. You should use Glean Magic + Pandemonium + (perhaps) Seed of Chaos on a bunch of enemies and then focus on interrupting, knocking and dealing your single target damage (Mabinogi money) through Indigo Fire and Rend Winds.