Being an Ex Driver i know how to take down a mau. First of all do not think of defeating a mau, all you need to do is pester it and the driver will either run away or get out. Also, if you are under lvl 30 do not even think about taking on a mau, you are just going to waste pots. If you see one, just run. Now if you are a level 30+ then you can start taking on maus. First thing you will need is enough potions. You should always be carrying some anyway for leveling. You will need to look at the mau and determine if it is a melee or ranged mau and how much Mau PT the Driver has. On melee maus, you can tell if the driver has less that 15 pt if he/she does not have boosters and is still using fists. On ranged, if the driver has less than 15 mau, he/she will have vulcans as weapons. For 15-30 PT a melee mau will have a booster and a ranged mau will have flamethrowers. for 30-45 PT A melee mau will have sword-fists and a ranged mau will have rocket launchers. at 45+ melee maus will have a net launcher on its shoulders and a ranged mau will have a secondary weapon on it is shoulders.

Maus under 45 PT you can solo. The trick is not to kill it but to make it go away or annoy the driver to come out. The key thing with maus is that it takes TONS of money to repair, about 500k Talent for full repairs. So most lvl 30s can do dmg in the 200s - 500s. This is enough damage to make a mau run away once it realizes it can not take you down because you keep on potting. If you are a ranged user, just kite (run and gun). Melee maus over 45 PT are annoying because they can net you down and you can not run. Also, force users do the best damage to maus.

Now if there is a group of maus you have to look for one thing, if one or more of the maus can net you. If theres a netter, run because if he/she nets you and they all attack you at the same time, you will not survive.

Now the best way to destroy/blow up a mau is to gang it. When a mau loses all its hp, it will explode and the driver will need to buy a new one. (one million credits.) The most effective way to take down one mau is to have one tank hit it and let the ranged users shoot from afar. Force users will do the most damage.

I will write a faq later on taking on groups of maus, but thats pretty tough. Remember, the key to defeating maus is potting and doing damage till it gets fed up and runs away (if you are soloing). You can then chase after it until the driver gets out so you can kill him/her or just let it go.

Soure: RF-Online-Wiki