Crossover for MTM w/ side firing woofer

I am upgrading the crossover for my speakers, custom built MTM with side firing woofers. Tweeter is a SB acoustics ring radiator, mids will possibly be Scan Speak discovery 5.25" and the woofer is a noname branded 8"

Do you guys have any crossover ideas for a design like this?

I think the current design is a simple 1st order design.

Would you wire the woofers in series or parrallel for a new crossover in this configuration?