Including blessing and agiup buffs, if you go for 100 total str, 30 total int and 20 vit, you dont have much points remaining. Kasa need 215 hit for 95% hit. With 88+12 dex, you can acheive to get 199 hit, wich is decent in that case. All remaining points in agi : you and up with 57+15 agi.
Wich conc pot, you can get an awesome 166.8 aspd. The priest in the vid seems to have ~185 aspd.
I stand by what I said, battle priest with spell cards and Int > battle priest with maces, % cards and Str.