Personally, I think that Escavalier works well as a physical attacker or a physical wall (movepool makes special wall a little tougher), so you'd want a moveset that can support either of these.
EVs: HP and Attack
- Swords Dance
- Aerial Ace
- X-Scissor/Iron Head
- Giga Impact/Reversal/Return
X-Scissor or Iron Head allows for STAB, but each with an added pro - Iron Head has a wider type coverage, but X-Scissor is boosted further by Swarm. Reversal has a good type coverage whilst allowing you to use damage you've taken and hit back, which can be used as a final move. Giga Impact, Return and Aerial Ace both also offer good type coverage, but Giga Impact acts as more of a last resort move when Escavalier is close to fainting, similarly to Reversal, whereas Return offers good power and Aerial Ace devastating accuracy.
Ability: Shell Armour
EVs: HP and Defence/Special Defence
- Iron Defence
Toxic allows poison damage, which can be either combined with Swagger for extra confusion damage, or Rest for healing to create a stall. Reversal at low hp followed by Rest allows for decent damage and type coverage, whilst keeping Escavalier as a wall and of course Iron Defence strengthens defence signifcantly.
These aren't 100% perfect or flawless, so if anyone wants to feel free to correct/change either of these as they feel like it.