Yes, the woofer wire is less critical than the tweeter wire. I used Canare 4S11 for quite some time with excellent results. I wasn't bi-wiring. I was using jumpers. So, you're results should actually be even better.
A few months ago I replaced the Canare with MAS Signature Hybrid speaker wire.
A few months ago I replaced the Canare with MAS Signature Hybrid speaker wire.