this is my red/white giant deck was wondering what i need 2 add or take out

*the purpose is to lock down the other opponent with white enchantments and produce a lot of damage*

Land/Artifacts
8x Mountains
8x Plains
3x Boros Garrison
1x Ancient Amphitheater
3x Boros Signet

Enchantments/ Sorcery/Instants
3x Oblivion Rings
4x Pacifisms
1x Arrest
1x Feudkiller's Verdict
1x Ghostly Prison
2x Giant's Ire

White Creatures
2x Wandering Graybeard
3x Oathsworn Giant
1x Brian Stoutarm

Red Creatures
2x Giant Harbinger
3x Thundercloud Shaman
2x Borderland Behemoth
1x Desolation Giant
x Hamletback Goliath
4x Stinkdrinker Daredevil
2x Sunrise Sovereign

so help wanted