First of all, is this a H2H or Roto league? How many IR slots? It could make a difference and I suggest adding them to your signature as well.
If I had that roster and willing to give up a top defenseman (this is key to know first), I'd be looking for a more offensive/reliable centreman than Kesler, so probably would target at least Toews. That could be a good starting point for a 2-for-2 offer, with another depth D/C involved to keep the roster balance.