FF,
I am ex CTC.
I have to say that I think the AQC would be the best option, however as you are over 34 I don't think they will help you. You certainly will not get a jet job thru CTC at your age.....sorry, but I think that is a fact.
A "SHED" rating? Don't know the value of one to be honest. As someone said, there ain't many "SHED" operators about. If I were you, I would concentrate on getting another non flying job. Keep instructing and keep your cash in the bank until things pick up.... and I reckon there will be recruitment in small numbers later this year.
Join BALPA as an associate member and pay £30 to go to the EMPLOYMENT OPPORTUNITIES CONFERENCE in London in October. See what employers say there. Even ask them directly as to what may be best.........it is a bunfight, but you WILL get up to date information.
You can then use your cash to pay for whatever may help you best then......
Remember a co pilot on a "SHED" will earn about £19k tops I reckon.......is it worth the risk?