If you're going to transfer in Europe, all Skyteam flights are going to be pretty similar whether you use KL, AF, AZ, or OK from their hub to TLV. I'd focus on the best ride you can get across the Atlantic. As mentioned above, the OK A310 from JFK is going to be the least desireable way to do it. I'd only take that one if its the only possible choice.

If you can find availability, I'd probably take NW or AF first, DL second, CO third, AZ fourth, and OK last.