Cause Leftover Recovery is really useful and there is no other recovery move here Jarlorda has on this set. If it carried Giga Drain/Leech Seed then I probably would have (but offensive doesn't have room for it and screens) but this is a blending of offense and defense, not a defensive wall. However, being able to survive opposing Jalorda, Ditto, Dragonite, etc is very helpful (sadly, special defensive Dragonite can survive +2 Hp Ice even without Multi-Scale if over 90% and can paralyze/phaze you/Fire Punch you)....I hadn't even thought of screens. guess i didn't see them on his movelist. *headdesk* why not Light Clay as the item?
On a Light Clay set I'd probably do
-Reflect
-Light Screen
-Giga Drain
-Leech Seed
And no one would ever expect a defensive Jalorda but it'd be pretty tough to kill with 75 base hp/95 defenses behind screens. This is probably the set I'd run without Peversity and if I choose it ingame (probably won't for the first one because I am so getting that adorable Otter Pokemon starter and Daikenki is really awesome).