After the Ravager taking the spot for the FTW collaborative post, I thought I'd re-visit the other unit I was pondering, Wyches. I was hoping to do it sooner, but have been a bit busy lately, but I have a few things to get posted in the next couple weeks.
Really, Wyches are probably the thing I slot into my army right after a Ravager. Although I've toyed with more Koven themed Haemonculus lists, I always find that atleast one squad of wyches gives me a much more competative list.
So lets look at the basic wych to start with
WS: 4 BS:4 S:3 T:3 I:6 W:1 A:1 Ld: 8
They have a fairly decent statline, nothing to shout from the mountaintop about though. The part of the statline that does the most work, is easily the I:6. Not only does this ensure you are likely going first, but it also means most non-fearless units are likley being swept if they fallback from assault. Add to this the 4+ dodge save in close combat, and the combat drugs, and they are a deal at 12 points.
Of course you can upgrade them with wych weapons, plasma grenades, and haywire grenades with a per model cost, and some assault weapons. Also, the Succubus upgrade is almost manditory to let you get an agonizer into the squad. I've yet to hear anyone not take wych weapons, for one point, they are far too useful. Remove opponents abilities for additional close combat weapons, and if the opponents is below strength 6, they half their WS when attacking the wyches. The first part is going to be the most obviously advantagous, but if you manage the +1 WS roll, the second becomes quickly the more potent. Most rank and file squads have WS4 at best, it's rare to come across higher. This means they will count as WS 2 when swinging against your str 5 needing 5's to hit. This is one of those rarities that make the Dark Eldar so potent, when was the last time you remember assaulting a squad that you needed 5's to hit?
Plasma grenades and haywire grenades are generally an as points allow upgrade in my eyes. Plasma grenades are only good if you plan on assaulting into cover against fearless troops. Otherwise, I'm probably going to try and pin the unit with a horrorfex to remove thier cover bonus. Likewise, haywire grenades are great, but with so many dark lances floating around, they really only come into their own against things like monoliths, and Black Templar landraiders with blessed hulls. Besides which, wyches assaulting a vehicle means they're getting shot next turn. As far as the weapon upgrades, like the blaster or shredder, I'm not overly partial of. In my mind wyches are meant to be in assault, and half the time you should be running and using fleet instead of shooting, so really the upgrades aren't that great.
Overall, Wyches are easily in the top 5 for best overall assault troops in the game, and once you factor in points they quickly move into the top 3. In my mind they are always going to be number 1 and they make an already dangerous Dark Eldar army, down right deadly.