It is a cheaper (BV and C-bills) Phoenix Hawk.
6/9/6 movement profile, just a bit less mass, similar armor. Trades some energy weaponry for MRM-20, giving it overall more firepower at the expense of some accuracy and range. With 24 shots, you can fire with abandon even at poor TNs.
Generally speaking what the Pixie does, so does the Chimera.
IMO slightly easier to control the heat than some of 3050s Pixies, lack two ERLLs does that.
The machine gun is annoying waste, really should have small pulse laser or flamer there but i suppose back when the Chimera was converted from MWIV to tabletop, MGs were the only weapon to actually get damage bonus vs infantry (plus MWIV conversion, constrained by that).
You need 100-200 BV free, replace a Pixie with the Chimera and you don't lose much.
I don't really see this the Chimera as a support 'Mech any more or differently than a Pixie is. A raider and a backstabber, heavily armed scout (perhaps the muscle in a scout lance in case they run into trouble). The MRM-20 does have coincidental use for suppression and mine clearing but that's merely extra bonus.
I suppose it would work as a roving support in a wider front... not sure i'll ever see a game on tabletop big enough this would be relevant role though.