I've tried MX-P 50 and MX-S boosted with Falco Tempo Long, MX-P 50 sponge reacts much better to booster than MX-S. From an average rubber turn to something much better.
If MX-P has the same sponge as MX-S I'd suggest to try MX-P 50 boosted.
If MX-P has the same sponge as MX-S I'd suggest to try MX-P 50 boosted.