You guys misunderstood me I didn't call the builds garbage I called the party composition I made garbage (Because I thought maybe I chose bad classes to have decent synergy party) I know very well the guys who make these builds are way more experienced in this than I am and that's why I asked you to help me choose the classes from the available guides (If I found the builds given as garbage I wouldn't ask that).
Now the main problem is not Maerwald, I know he is pretty easy to kill, before I restarted the game I had a party of my own made 6 companions and I steamrolled till white march I quest. But then I decided to start my game anew and build a party with these guides as I have limited experience in mid and late game.
Anyways as I had very hard time in early game, I thought maybe this party composition doesn't work, but now I see that I just need to beat Act I and then it gets easier.
Thanks!