Shield Slam Enchants

[Dakhanavar]

Hello I've been working on putting together my block value items and had a question regarding enchants. So far I have been trying to build up str and add sockets for crit % or helm and shoulder enchants but the crit is still lacking. I do have some outdated wrath gear like the shoulders which have decent block value but stats are not the best for for any serious pvp. I have gathered up a list of items I'll be after in the future but the question is agi or str for enchants?