The 75 rating is currently highly prized (check out how few 75/76 drivers are out of work at the moment).
The 73 rating is 300 - 900 and Jet2 has said its going to run the NG/Classics as a dual fleet and convert all crew. Differences course for all next winter apparently.
A huge number of ex-Jet2 peeps have proved both 75 and 73 ratings have opened doors both at home and abroad. I'm not a one man Jet2 recruitment show, just pointing out it is viable route from TP to Jet. Not great, but viable.