Gladiator

The Gladiator is a formidable assault mech with decent health. It is very good against aircraft, because of its aircraft damage bonus. The primary weapon is dual cannons, which you should use against slower enemies (or enemies with low health), and its dual machine guns are great against fast enemies, like the Manta. As a level 10 gladiator, you can use a damaging laser blast to wreak havoc on foes.