[BUILD SUBMISSION] VGC Blissey any suggestions

[QuaillMan2009]

(Blissey) @ (Leftovers)
Base stats:
HP: 255
Attack: 10
Def: 10
Sp.Atk: 75
Sp.Def: 135
Speed: 55

Ability: (Natural Cure)

EVs: 252 HP / 190 Def / x SpA / 66 SpD / x Spe

IVs: 31 HP / x Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe

(Calm) Nature

- Helping Hand
- Heal Bell
- Rest
- Light screen

This is my first public build not sure how it works and i didn't know how to do the battle calculations.

This build is has no attacks but can help heal and power up your other pokemon's defense and offense.
And with heal bell you can keep your team status free.
Blissey is a straight defensive stall, with the Natural Cure ability will cure any status once you
switch her with another pokemon and with Rest you can heal yourself switch and then have Blissey return for more punishment.

When i use Blissey i pair her with my physical attackers like my Machamp and Gyrados. Helping Hands helps if i need to attack the first turn and can't get off a Bulk Up or Dragon Dance. i also bring her out when my opponent has been burned, poisoned, ect since she can take a lot of hits and still recover.

if you have any suggestions let me know please