Avg Arbok + Gengar with no X Spd: 19s 
				      With X Spd: 22s

Chance of getting trolled: With no X Spd: 12.5%
						   With X Spd: 12.93%

Avg time loss to healing for Lance: With no X Spd: 0.83s
				      				With X Spd: 0.4s

Conclusion: X Speed on Arbok only if Para heals + Full Restore and <60hp or confused and <83 HP.