Knowing wont help roll a Samurai, Ranger.
When you roll the stats for a character. To the left of Stats are the class guild symbols. The Samurai Class guild symbol, is a Oriental looking white colored circle.
The Ranger symbol is a Green Tree, surrounded by a white colored circle.
Underneath the symbols is where the name of class is.
Reason why that is important, is that the only thing you should watch for when click roll, reroll button, is the symbol, Samurai, Ranger name, instead of looking at stats.
It generally takes 50 to 100+ rerolls to roll a samurai if use a Dwarf, Gnoll, Human, Elf. Dwarves make best Samurai.
It Generally takes 165 to 333+ rerolls, if a Human, Elf, to roll a Ranger. Humans tend to roll a Ranger more often rhen Elves. Also a Elven Ranger Takes Forever to level up, while a human Ranger Levels a lot quicker.
If get extremely unlucky it could take 4000 rerolls to roll a Ranger. If get extremely lucky can roll up a Ranger with inly 25 to 50 rerolls.
If unwilling to wait, best bet is to roll up a human with only 1,2 13's, with rest being 14's, 15's, 16's. Then by level 3,4, if lucky, can then graduate from ranger guild.
Both ways are doable, but take patience.
My Party has 2,3 Samurai, 3 Ranger, 3,4 sages, 1 Mage.