Is adding Pascal Dupuis to this line up worth dropping any of these players?
Only player you should consider is Hodgson and that comes with a question mark.
He has slowed down over past 10 days or so but still seeing lots of ice centering Vanek and about 25% of PP time. On top of that you only have 3C's (no problem) and if one goes down you can use him there.
Dupuis only sees about 7% of PP time but regular 1st line ice with Crosby not to mention Malky on double shifting as a linemate and centering 2nd line.
Over all I would say ride the Sabre
For LIndback ,no, you may need him if one of your other tenders go down