I personally think +emnity is not as valuable as having a really good double melded or triple melded piece of armor. For example: Fighters Breeches which have +10 emnity are not equal to the gains you get from having double melded Felt Trousers. I will be modest and compare the tier IIIs below. As a warrior you want to have you str and vit capped in order to deal max dps, which also helps you get hate. Why gimp your damage for a little emnity when you can have the best of both worlds? I never lose hate on bosses because Im dealing almost as much damage as a Blm can then I have my hate abilities to add. And yes this has been parsered. I usually rank 3rd under the blms in most usual party setups. With this said, use your own judgement and experience these things for yourself. It is always best to have multiple sets of gear.
Fighter Breeches
Defense 130
HP 20
Strength 11
Vitality 9
Critical Hit Rating 10
Enmity 10
Felt Trousers with Double Melded Ironmans Will III
Attributes
Defense 130
HP 23
Strength 15
Vitality 17