I think normal Blaziken should rise to B or B+
I'm using it just now with great success. A mixed life orb set can basically outspeeds and OHKO Aegislash, Amoongus, Kangaskhan, Not AV Landorus-T, Metagross, Not bulky Mega Salamence, Hydreigon, Terrakion, Bisharp and probably more I don't remember...