5* gwenpool and masscre

I just opened my second 5* hero crystal and got gwenpool from it .completed her to rank 2. I also have a 4/40 massacre .
They both have a synergy is this synergy good or not?
Should i play with both of them in AW?
They both have a synergy is this synergy good or not?
Should i play with both of them in AW?
0