The Deadpool Talk
Explanation: Using chat while fighting to barrage your opponent with puns,bad jokes and typical nonsense until they are driven to the point of insanity. Similar tatics include Trollfacing.
The Samurai Banzai
Explaination: Equip your mech with swords, armor modules and repair kits. Charge and hack your enemy into pieces.
Note: actually works with the (currently-removed) 100DMG sword.
The Sexy No Justu
Explanation: Flirt with your opponent via chat. Your opponent should overheat and develop a constant blood loss from the nose to the point of death.
Note: Beware of stalkers.
The Aegis Equipment
Explanation: Aegis is a shield that frightens foes of the wielder. Equip all available slots with big guns and big swords. They don't have to be damaging- just be sure to make your mech look intimidating so your opponents will quit upon the first round.
Nice tactics... but here's mine!
Crazy Meteor Slam
Equip a meteor sword and 3-jump legs and repeatedly jump-slam down and smash them with it.
Equip 2 or more shotguns to scare your opponent. Simple.
Type random letters and numbers into chat to confuse the enemy, then shred them to pieces with swords or guns.