So, 14k AR and 5 frame zeal vs 10k AR 4 frame zeal and ~35% extra deadly strike?
I don't know what targets are you running with him, but there are very few builds who can profit from such high AR. If we assume you and your opponent are same level, and lets assume opponent has massive defense of 5000, we are talking about 73.7% vs 66.7% chance to hit, or you would lose ~10% damage output because of AR. Now, if we compare 5 frame zeal vs 4 frame zeal, we talk about increasing damage output of ~25% just because you attack faster. Now, to combine both, you lose damage because of lower AR, but increase damage per second because of faster attacks, overall your damage will increase by ~13%. That is if you attack target with 5k defense, while monsters usually have much less. Against 3k defense target you would increase damage output by 17% by getting faster Zeal. That is not including higher deadly strike %, faster applying of crushing blow and other things. My calcualtions are not precise, they are rather clumsy. But, fair to say that I would go for faster Zealing and don't really see a point in having such huge AR since most monsters have "low" defense compared to it.