What do you guys think about this build? is it viable or am i losing too much power for ignoring later circles?
If you going barbarian take highlander instead of peltasta. Depending on hook usefulness you could take the key instead. Something like this.
Thanks for your answer 
so it’s worth losing Swash buckling for highlander?, also i rode unlock chest isn’t worthy because u get keys easy, is that true?
Peltasta is ok but you would have to weapon swap when you change to barbarian. Highlander lets you use twohander early, and has two handed sword mastery class attribute.
You could also do a build like this. I left some points free for you to decide.