I just found out that the importance of vitality and the actual effect of it seems hidden from skill tooltip. It says “10 vitality points gives you 130 health”, “20 pts give you 360” etc. This didnt sound like much so I skipped it for a every long time. I have always had great problems getting one- or two-shotted by those green bombs spitters throw and the homing pulse missile cuttletrunks launch, and I didnt think there was much to do than to dodge them every single time. or die. However after I finally put just two points in vitality thinking, hey I could do with a little bit of extra health my healthbar turned from green to blue and was boosted incredibly high, like several times what it was before (I had full green healthbar before adding the 2 skillpoints to vitality, but after it turned blue, it was only a somewhere between 1/4 and 1/3 full, meaning, if my visual math skills are correct, that just two skillpoints into vitality boosted my health 3-4 times. I can now get hit several times by those same bombs. What I guess is happening is the Health Epic I have, it multiplies the gain from vitality x3, so that it is not only 360 hp, but actually 1080 (3x360). However that still doesnt sound like it can add up to 4 times the total health, so im still quite suprised. I think I have to redistribute points into vitality now seeing as how much health it actually results in.
I wish there was some way to see the calculations behind this, would be nice if the game would show me the actual effects before confirming the skilpoint assignment. Maybe this thread should go in suggestions.