Well, rather than start a new thread, this one seems quite usable...
How to fix the Troligan? First let's consider what's wrong (and anything that's right with it) and perhaps this will show the way.
First, compare it to the other Minbari battle choices - only the Morshin beats it in terms of craft. With a solitary flyer flight, the Troligan trumps the Veshatan and the Tinashi.
The Tinashi is weaker by around 20 points on hull and crew, wheras the Veshatan has slightly more hull but slightly less crew.
Speed-wise the Veshatan and Tinashi are way ahead, and the Tinashi has 2 turns.
AD-wise, the Tinashi is probably best all-round. With 4 beam and 8/6/6/6 minibeam. The Troligan rolls in an all-round second with 2 beam and 8/6/6/6. The Veshetan trumps it on beam but sacrifices the secondary guns.
All are hull 5, all are stealth 4. So, what role does the Troligan currently fill? No tougher than either ship, but can soak up more damage than a Tinashi at the cost of speed and beam shots.
Bumping it up to hull 6 would definately separate it from the others (the all round warship Tinashi and the fast gunship Veshatan). The weapons loadout is pretty good as is - its fragility is what makes it redundant.
Bumping it up to 2/45 would also make it a real close in powerhouse with that low speed making for a good turning circle.