I would opt away from manufacturers tip lines.
In my very recent experience the connector loops for the tips tend to get snagged on the rod eyes when playing a fish at short distance. This is due to the over exaggerated size of the loops connectors used by the various line companies.
My normal approach to using sink tips is to buy a mill end DT trout line(sinking), to match the taper of your salmon line, cut them up at various lengths, put braided loops at the ends and use as required. This gives you far more options than the manufacturer’s tips and reduces the chance of your connectors being caught up on your rod eyes.
With regards to a line to suit this method, I would use one with a fairly thick front taper. i.e. a Mastery xlt or a rio accelerator if you can get a hold of one.
It is not because thing are difficult that we dare not venture.
It is because we dare not venture they are difficult.