What is more tanky ?

[𝒦𝒾𝓉𝓉𝑒𝓃]

Veno for sure,

I like this one. 

[Zirkon]

Seekers do get better def lvls than WRs When you are end game geared
But BMs Having Demon Aura And Magic Sutra They indeed get way tankier than Seekers
And BMs having Leaps Helps them to Survive more than a Seeker (mass pk wise)

[Quit]

This is more tankier than all

[gigachad]

BM my loves ^>^

U love like everything dude.. maybe they should dress u up like woman, makeover and stuff so u could be a female actor in 50 shades.  Haha hehe : DDDDDDDDDDDDDDDDDDDDDD...

[Vermilion]

Blademaster by far

You only say that because you played my seeker
Noobie
On topic: WR's

[Solomon]

me im best

[exe626]

whichever class i'm playing

[ahed]

>best me<

[MinYoon-Gi]

You only say that because you played my seeker
Noobie
On topic: WR's

weak seeker

[アイドンノウくん]

The answer depends on how you define tankiness.

Here are a few possible definitions for tankiness:
a) The amount of time until death of a char standing still with self buffs while relying on his own skills to survive
b) The amount of damage a char receives until death, while standing still with self buffs and relying on his own skills to survive
c) The amount fo damage per unit of time a char receive until death, while standing still with self buffs and relying on his own skills to survive
d) Another version of ( a) but with full buffs 
e) Another version of ( b) but with full buffs
f) Another version of ( c) but with full buffs

Forget about mass pk and other factors; because an archer might survive longer than a barb or bm until his first death due to obvious reasons. 

[Subzeroo]

Sins. Jk

BMs are more tanky.

[Esok]

BM baby

[PedroSner]

BM baby

i miss you brother

[Guardian]

If you've got an IQ below average then WR's will be tankier but you can do just fine on a seeker if your IQ is above average.

But in terms of mass pk, just go with a WR.

[OmegaRa]

WR with physical marrow tank all casters mane