I've been hearing that the Troika line is too slow and isn't really good, I'm planning to get the Triglav as one of my Tier 5 weapons. I've already got the recipe for the Grintovec.
I've got the Snarble Barb as my second weapon, me and my friends usually go together. One of us is Swordsman, the others a Gunslinger, ect. I'm in the middle of Dusker and have no trinket/extra weapon slots.
Should I continue or stop and choose another line to work with?
You're using a piercing sword and a normal sword? Then stop the normal sword. Replace it with an elemental sword or a shadow sword.
(As soon as you're carrying more than one sword, then you don't really want any normal sword in there; your swords should be of distinct non-normal damage types, to deal huge damage to a wider variety of monsters. For details, see my sword guide.)