hmm I wonder if it would be possible to Recobox while feeding 9 mags so you at least get SOME experience... nah probably not XD
But I actually ENJOY raising mags! The charts here at PSOW make it easy so you don't have to worry about messing up or getting unwanted results. I just put the finishing touches on my cutie Ribhava last night... Now I'm thinking of making another one... or maybe the weird one that looks like a mask... Ravanna I think? That is one cool-looking mag, and I rarely see people with it! I'm going to start a Ravanna Revolution~~~!
Check out how cool they are, and they're the only mag (that I can remember lol) that hangs out more in FRONT of your character instead of behind it! neato~~ http://www.pso-world.com/magguide/ravana.gif
But seriously, I think mag raising is an important part of the game - its nearly as crucial (if not as crucial) as raising your own character's stats... so if you like leveling, you should like raising mags too because they can be individualized to your characters' goals. Unless... you just like killing things and using the high-powered mag allows you to slice through areas without trouble, pushing 3-button combos one after the other while mindlessly racking up exp...
But sooner or later one-hit-k.o.ing everything actually DOES get a little boring, at least for me! (it doesn't happen for me much, since I'm a FOnewearl, but every now and then I'll blast through VH forest, mowing down boomas with 1025-damage foie-balls! woo-hoo!) Added elements to the gameplay like mag raising (and coming up with funny symbol chats) help keep it fun and addictive for many more hours.