in the present regional airline hiring environment, log total time as fast as humanly possible to get to 1500 and make sure you get the other requirements for ATP covered in that time. They don't care which seat or how many engines. If you wish to avoid airlines, the 135 SIC in a multi crew and multi engine turbine will look much better on your resume. Stick around at AMF and upgrade to captain and get 1000 TPIC and your resume will look even better.

My $.02