The way I see it, the 5* Troikas get pretty bland charges, especially for 5* swords.
There isn't much more visual power behind them than behind a Troika, and heck, aside
from damage, there isn't really much of a DIFFERENCE. So, here are my ideas.

Sudaruska
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The charge attack does not lunge the player farther than the other troikas. However, what it
does do is send a bunch of rocks flying. These rocks function much like shard bomb shrapnel, but
they detonate as soon as they reach their maximum range or hit an enemy. The range of these
rocks is about 4 squares farther than the initial blast, and they deal around 70 damage each and
can inflict stun.

Triglav
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The charge attack sends an expanding wall of icey wind flying forwards. This wind pushes
enemies back, deals minor elemental damage but hits rapidly, and can freeze them as well.
It extends about 5 squares forwards from the initial ice blast.