IF you lay out your team rules we'll have a better understanding of the situation and be able to give you better advice. No way in a one-year or keeper I'm trading my Rask/Price/Lundy for Anderson. If the league rules are such that I have a bad team but am rebuilding and could trade my Rask this year for Anderson and can keep Anderson then maybe but I need to know how many I can keep and which players I can and can't keep.
From your perspective if you're in first place and win now mode than dealing Anderson for Rask/Price/Lundy is a huge upgrade this year and enough to put you over the top then I would most likely pull the trigger but again it depends how much this hurts you in future years.
Give us some context to help you out.
12 team H-2-H 1 year league, daily roster changes, 3 goalie start minimum/week
2xC, 2xRW, 2xLW, 4xD, 3xUtil, 2xG, 5 Bench
G, A, P, PIM, PPP, SHP, GWG, SOG, Hits, W, SV%, GAA, SVs
C: C. Keller, C. Mittelstadt, B. Nelson, R. Strome,
LW: K. Connor, B. Tkachuk, J. Gaudreau, J. Marchessault, E. Rodrigues, A. Lafreniere
RW: K. Fiala, J. Bratt, T. Jeannot V. Arvidsson
D: R. Josi, J. Trouba, E. Gustafsson,
G: L. Thompson, F. Gustavsson, V. Vanecek
NO IR