We are willing to make mention of WAR magus leveling specs and tips. This is intended to be a guide for people who want to play a Magus, as he currently is. If you take strong interest in it, let's make it clear for you.
In most games, leveling is the boring process of reaching the endgame where you can actually play. This is the greatest advantage WAR has since we enjoyed leveling that much that we could do it again. Main reason for that is that you are not forced to just questing or grinding all your way up to 40 but you can actually just RvR your way there.
We made a decision to mix both aspects of the game, as we suspect most of the players are doing. There are some bad news and some good news for guys who want to do this.
Magus' Masteries are not equally viable for either PvE or RvR. Some masteries are just bad for one or the other aspect. You are able to easily respec since it costs almost nothing and that you have at least one strong option all the way therefore we're going to list what specs are good for PvE and RvR through your leveling and explain why.
Tier 1 is the worst part of any caster's life. All RDPS get their root at 10, so until then our self defenses are minimal. Things tend to be even worst for the Magi since a large part of the skills we get at those first levels focus around our three pets. That means that, since you will only be using one of them at a time, a large part of your skills will be wasted.
The good thing is that 1-10 does not take more than a few hours and that a Magus can actually do relatively well in PvE for those few levels. Just summon a Pink Horror pull with FRF, Glean Magic, Rend Winds, Infernal Blast, and Demonic Maw to death and repeat. Just skip the abilities you do not have at lower levels, it will still work. Try to set up your demon at a position where you will pull more than 1-2 mobs to get the most out of him.
RvR is nothing impressive for you at those levels as well since your abilities are not enough and you lack most important ones. Simply nuking is never a good option for a Magus and you are forced to do that at those ranks. Still, if you have a good healer, Infernal Blast and Daemon Lash is a nice thing to do. Otherwise find a nice spot and nuke. Even Glean Magic is not something really important since most enemies lack resists.
In Tier 2, things get more interesting here, as you slowly get your important abilities as well as your first tactics. The mastery points you get are not enough to get anything game breaking, so we suggest you just stick with Changing for both PvE and RvR, since they are the strongest and most useful ones generally. That means that you should focus on using changing abilities but the difference is not really big yet.
For PvE, things become much easier after getting Daemonic Armor. Remember that we could kill 3 enemies of our level even before getting Pandemonium by putting Glean Magic, Baleful and Infernal Blast on them all, rooting them, running a bit back and killing them one by one with Rend Winds. After getting Pandemonium things get even easier since it does good DPS on many targets and benefits from Glean Magic as well. We suggest you pick the first changing tactic =as soon as possible and using it until you can get Endless Knowledge and together with Endless at 20.
For RvR, these are actually nice Ranks. Through them you will get some of your most useful spells, like Surge of Insanity and Warping Blast, as well as your main AoE DoT, Pandemonium. Using same Mastery and tactic choices, you can deal some serious damage that is still relatively hard to heal since healers' lack AoE heals until level 20. Just make sure you try to interrupt, knock and root people as much as possible and rely on Rend Winds for single target damage and you will do well.
In Tier 3, things start getting trickier here. PvE and RvR You can ask for different specs and actually need to start focusing on mastery in order to be successful.
For PvE, at 21 you can spec Demonology and get Agonizing Torrent. Combine it with Warped Flesh and Endless Knowledge and you can begin learning why leveling a Magus is easier than leveling any other class. Just do AoE pulls in your quests and kill as many mobs as possible. If you feel like grinding for an influence reward, just find a nice Public Quest with a long phase 1, set up your Blue Horror, pull 5-6 mobs with whatever way works with you, cast Agonizing Torrent, Glean Magic, Infernal Blast, Pandemonium and spam Daemon Lash can make even bigger pulls if you feel like risking it a bit and using your Root and Daemonic Infestation to buy you some time. This is simply the best PvE spec you can have for rest of your ranks up to 40. At Rank 26 you can get Aegis of Orange Fire as well which really boosts your survivability and helps a lot with killing.