If you want to run speed Escavalier should probably run 84 speed EVs to catch Slowking, which could be a problem with the basis of your team, because it getting paralyzed is almost a waste of a turn. I'm pretty sure getting enough for Slowking will outpace most of the paralyzed metagame other than Aerodactyl and Accelgor. All-Out Attacker Rhydon will probably be the best way to go. However, Stealth Rock + 3 Attacks may also be good because Glare Druddigon can be hard pressed to fit Stealth Rock on its moveset. Also, running an Eviolite means you can take more hits from fast Flying types, especially Swellow. Finally, for the last slot, a Pokemon, preferably a bulky one, with spikes may help out. With several hazards, it will become a lot easier to clean with Sceptile and you will obtain more OHKOs with Rhydon and Escavalier. Qwilfish may help because it has Thunder Wave to spread paralysis even further and Spikes, although it may be redundant with Slowking. If Spikes isn't necessary, any Fire type will help out - you can create a FWG core with it. Magmortar in particular is very strong but a little on the slow side, meaning paralysis helps it out. Hope this helps!