I was thinking about getting Chaos set and use either/these swords with tha set but I'm worried about that the damage bonus isn't really that good.
I am currently using them with Barbarous Thorn Shield (sword damage increase Med).
So my questions are...
How much damage does Suda/Triglav deal with Sword Dmage Bonus MAX?
Do I even need MAX dmage or am I good with V.High?
Would Black Kat Cown be better with some other shield? (I would have S. Dmage Bonus Ultra, or whatever)
Damage bonus Max increases damage per hit by 24%, just like with every weapon. However, this is before defence is applied.
For a quick comparison, Lancer Knightz have wiki pages for depths 19 and <"http://wiki.spiralknights.com/Lancer_Knightz_(Guild)/Sword_Damage_(Depth_24)">24. I also have a spreadsheet with damage for every level of damage bonus with every weapon.
In practice, I think it's a good idea to have some damage bonus for your Troika, as it will keep up your interruption power and let you keep backflipping gremlins and staggering turrets and whatnot. Max helps, but you can make do with V. High. It depends on a number of factors, from depth to difficulty to party size to whether or not you're currently in a danger room to whether or not you think you even need interruption power or you just want make do with the knockback.
Troikas are very slow, and Swiftstrike Buckler would help a lot at making the sword easier to wield. You could do something like:
Chaos Cowl
Chaos Cloak
Swiftstrike Buckler
Damage sprite perk
Beause Sudas are excellent when charged, I would strongly recommend Chaos over Kat Cowl for wielding it.