This may seem strange-but in comparison to wyhces an Archon is too expensive for what it does...
Take an example of a typical lord I use...
Lord
R.Jetbike
Combat drugs
Shadow field
Power weapon(or agoniser)
P.Grenades
T.helm
170 pts min.
So in order for him to kill 170 pts of smurfs for example that would mean killing a whole tactical squad by himself- fine he's capable of doing this...but wyches cost some 50 pts more (including transport) and they can kill MORE- plus they ARE a scoring unit.If deployed from a portal(like in the example above),they aren't in much danger of being shot at,I send them in a target rich zone - sit back and watch the show...
A Wych squad that takes 180 pts worth of enemy lives and claims an objective has paid it's points and the points of the second wych squad.
So i took 3...they are good- let's take 3.
Everybody,all the other armies take multiple choices of units that are more then worth their points.
Landspeeders,Obliterators,Wraithlords
Making this into a wych cult prevents me from taking the heamonculus...
On to him...
This guy is deployed carefully,and on turn one(yes one!
) he opens the portal.
After that he keeps his 60 points alive,or proceeds flaming an over enthusiastic
enemy unit...
For what he does he is the best choice,IMO.T4 is T4...no instant kill by assault cannons,Autocannons etc...if by any chance I happen to get shot at and fail my 2++ roll
Talos is worth considering,Warp beasts come to mind-cheap and with an Agoniser....