We'll need WAY more information to even start to make an informed answer here:
roto or head-to-head scoring, scoring categories, minimum goalie starts required.
Without knowing more I'd say don't do it. Toews is better than Pavelec but if it leaves you with just Lehtonen and Greiss you're in serious trouble in net. Unless this is a league where you only start 1 goalie and its mostly peripherals I wouldn't take the deal. Post the details requested above for a more complete answer.
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