What is the best starting attributes for a troll zerker?

15str 10quick

How many hit pts per point of con does a zerk get?

Is there not an argument that tanks (and light tanks like a zerk) should consider 10 str / 10 con / 10 qui?

5 extra pts of str vs maybe 45 hit pts? Splitting hairs I guess ultimately.

Berserkers are on the highest hit point table, and are usually the first to be killed in a Mid tank group. If there are any classes that +10 con makes sense with, I would say they are light Det tanks, like the Berserker. While the +5 Str could still be better, I don't think you can really go wrong with either. You hit a little harder with one, and you last little longer with the other (the point being, both equal more DPS, really). Both are good for their own reasons.

+15 strength improve your chance to hit and your style damage by 3-5%
+15 quickness improves your base damage, dodge and attackspeed by 1.5%
+15 con improves your health by 5-8% depending on the amount of buff you got.

I would say if you prefer to run a 2-handed specialized berzerker go +15 str
If you prefer to go dual wielder specialized berzerker go +15 qui
You can also mix 10/15 in qui and str, but you will miss out on some good HPs.

Since Zerker can stun only upon evade, and the stun is a 2-chain 7sec stun, I would say that QUI>STR.

IMO zerker should go 15QUI-10CON or 15Con 10QUI, regardless of sword/hammer/axe.