Do you really need an ATPL ? If someone will give you a direct entry command then it would be handy, but otherwise you'll finish it within months of joining an operator where you need it and would be ready for a command pretty quickly.
If you do, Huggy's got the right idea. Don't forget to get someone to sign off your time over there just in case it ever gets questioned.
Lots of movement in the industry right now - don't hang about !