Given the figures B&B is quoting they’re likely a 747 Captain so either Div 2 or 6 so no super offset to worry about.
Chief Pilot today indicated that any post RIN training course could be up to 18 months away so 12 months is optimistic. You would hopefully get two years back on 160 MGH? For all our sakes I hope that’s the case!
I’d run your logic past an accountant B&Blue and decide whether the $$$ on offer offsets the training course, cyclics and overnight flights you’re still going to be doing in a few years time.