There's Corvis, which is kind of odd. UAC10 and 2 MPL. 40 tons, no XL engine, but it has jump jets. No FF armor, but it does have Endo Steel.
The fluff states "its lack of maneuverability relative to other Mechs in its weight class relegated the Corvis to defensive duty in built-up Terrain, or as support for infantry and armor forces."
It also states "and functions as a "sentry Mech" near low-priority targets, allowing heavier units to be deployed elsewhere. The Corvis is also used as an escort for infantry and slow-moving vehicular units."
Sure, it doesn't have the two AC10s, but it certainly seems to fit the fluff.