Int affects Mana Consumption and Casting Time

According to JP wiki, that's true, but frankly I'm skeptical. With over 1k Int while wearing nothing at all, I certainly don't see anything remotely resembling the 20% mana consumption reduction I should see if JP wiki has its numbers right. I've done mana usage calculations based on numbers that don't take these mysterious bonus effects into account and have never run into any error too large to be accounted for by decimal rounding in the client display and latency -- certainly never a 20% discrepancy.

I'll look into it. Aubog from that thread is an old guildmate and we still keep up with each other; he says a buddy of his did some intense number-crunching and verified that the bonuses do exist, but I want hard data.