Um - not sure too many charter airlines do 4 sector days, so which airline is left that does mixed short haul and long haul......
RYR are now going to operate Canaries to Sweden. That is going to be >6.00 each way. The next day you could do the more normal multi-short sector day. !2 hours in an aluminium tube with no exercise, not even standing up, except for 5 minutes on the turn-round, seems like arduous long-haul to me. Proper single sector long-haul a/c have a cockpit big enough to stand up and stretch in. IMHO using short haul a/c for long-haul trips is not the most healthy of daily occupations. Been there, done that, in both types of a/c and so have much personal knowledge; before the usual slagging off along the lines of if you don't like then quit. I didn't & I have.