Since i have apple, i just got the game but I thought I would try to help you fill in some of the question marks for the engineer. I only have 25 points to allocate, so I'm not sure of patterns yet, but will confirm as I level more. From base stats: Str = 3, Dex = 1, Int = 5

STR
+1 crit @ str = 11, +1 crit @ str = 21
no increase in dodge @ str = 28

DEX
+1 crit @dex = 22
no increase in dodge @ dex = 26
+1 damage @ dex = 10 (DPS remains same), no additional @ dex =26
no increase in armor @ dex = 26

INT
no increase in crit @ int = 30
no increase in dodge @ int = 30
no increase in armor @ int = 30

Hope this is a little helpful!