Do something while SRing so you don't get burned out. IVs and Nature are all luck.
On a related note, I have the following events on my OR and was wondering what order I should SR them in (if I shouldn't SR some of them, also let me know):
-HA Serperior
-HA Emboar
-HA Samurott
-ESpeed HA Dragonite
-Diancie
-Shiny Rayquaza
-Hoopa x2 (Maxsoft and McDonalds)
-Sludge Bomb Zoroark
-Maxsoft Arceus
-Festive Feud Delibird
-20th Mew
-20th Celebi
-20th Jirachi
-Zygarde
-HA Articuno
-HA Zapdos
-HA Moltres
-Shiny Xerneas
-Shiny Yveltal