Well as you say you get paid well etc, now you have a good rating ie 139 but its not used so much offshore in the UK/EU abiet DK NL and SNS. If you are interested in offshore work then you will stand in line for a Capts slot no matter how much time you have..... Are you willing to take a SFO post? And wait for 4-7 years for a Capt's slot
There are a large number of SFO's looking else where at the moment. If it was me, and you liked your location and conditions then stick to it.
But maybe you are looking for something else other than offshore, well there is a wealth of knowledge on here that might be able to advise you. Good luck.