So I have been thinking:
How good ARE wyches in a fight, and where are their strengths and weaknesses. For the sake of simplicity we are only talking about Wyches veteran enough to go on raids.
The way I see it Wyches are probably best at:
Duels. 1 vs 1 combats between skilled combatants are a classic form of gladiatorial entertainment.
Fighting Beasts. One wych or a small group are put in the ring with beasts like clawed fiends or Khymerae, in a fight to the death.
Slaughter of lesser combatants. A small group of wyches vs a large group of armed slaves. A squad of 10 fire warriors, say, armed with knives, vs 5 Wyches similarly armed. Only one group walks out.
Monster hunt. A carnifex, Cadachan Devil or similar giant beast is unleashed in the arena with a group of Wyches who then work together to take it down.
What are some others that I might have missed?