Hex and enanthate are both long esters. They can be taken on similar schedules, basically interchangeable although one may be slightly longer than the other. Acetate is the short ester often used with tren.
Didn't totally read your post before replying. I think you are right about enanthate being the longer ester but I believe you can still shoot twice a week with hex and be fine.
i did 100mg EOD it was a sick expeirence i had hypoglucemic sides i had to eat a candy bar at my job thought i was going to pass out but i looked insane