I believe that the airlines want to ideally see quality time in the log book over quantity time. 1000 hours may look impressive on the CV but at interview they want to know that it's not all on a C152! Having said that 1000 hours on light aeroplanes and a fATPL is better than 200 hours and a fATPL. Anything more than 1000 hours on light aeroplanes is probably disregarded by most airlines.
It is so difficult to try and get quality time. Air taxi work would be the most likely of occupations for someone of your experience. Or perhaps acting as the "eye in the sky" for some radio station. Even if you could blag the odd positioning flight for some flying school on their light twin it would all be advantageous.
Remember that there are literally hundreds of guys out there with 200 hours and a fATPL. If you can stand out from them in terms of experience and total hours then that has to put you in a more favourable position.
Good luck.