Forget
CAD only it murders harlequins and Inquisition.
Forget highlander it kills Inquisition and weak codexes suffer more from it then the stronger ones. Thunderwolf, wulfen, screamer stars or knights don't care if you restrict them to just use one of them

The same holds true for maxing the amount of detachments.
Here are some of the idea's I like:
( just don't use all of them at the same time since some of them don't play nice with others of them. )
-remove all command benefits and bonuses from formation and detachments except objective secured.
-Use the better killteam rules like restrictions on unit choice ( such as total
av,
sv, wounds etc)
-Use the community comp system
-Just ask players to make a cool narrative list and convince them that this is their opportunity to play with stuff they regularly could not play with
-Use the community comp system as calculation tool to give players a extra points to spend when they don't field powerful units or combinations.
Automatically Appended Next Post: Here is an example of a nice
CAD / highlander list to show you that it doesn't really hurt the baddies
+++ New Roster (1499pts) +++
++ Chaos Daemons: Codex (2013) (Combined Arms Detachment) ++
+
HQ +
Daemonic Heralds
··Herald of Tzeentch [Daemon of Tzeentch, Disc of Tzeentch, Psyker Level 3]
··Herald of Tzeentch [
D6 Exalted Daemonic Reward, Daemon of Tzeentch, Disc of Tzeentch, Psyker Level 2]
··Herald of Tzeentch [Daemon of Tzeentch, Disc of Tzeentch, Paradox, Psyker Level 2]
··Herald of Tzeentch [Daemon of Tzeentch, Disc of Tzeentch, Psyker Level 2]
Kairos Fateweaver [Daemon of Tzeentch, Warlord Trait:]
+ Troops +
Nurglings [Daemon of Nurgle, 3x Nurglings]
Pink Horrors of Tzeentch [Daemon of Tzeentch, 11x Pink Horrors]
+ Fast Attack +
Screamers of Tzeentch [Daemon of Tzeentch, 9x Screamers]
+ Lord of War +
[
FW] Chaos Knight Errant [Foe-reaper Chainsword, Heavy Stubber, Ion Shield, Thermal Cannon]
Automatically Appended Next Post: Or this nice list ; )
+++ New Roster (1496pts) +++
++ Eldar Craftworlds: Codex (2015) (Combined Arms Detachment) ++
+
HQ +
Warlock Conclave
··Warlock with Witchblade [Rune Armour, Shuriken Pistol, Witchblade]
+ Troops +
Rangers
··5x Ranger [5x Mesh Armour, 5x Ranger Long Rifle, 5x Shuriken Pistol]
Windriders
··3x Windrider w/ Twin-linked Shuriken Catapult [3x Eldar Jetbike, 3x Mesh Armour, 3x Twin-linked Shuriken Catapult]
+ Heavy Support +
Lynx [
FW] [Lynx Pulsar, Shuriken Cannon, Spirit Stones]
Warp Hunters [
FW]
··Warp Hunter [D-Flail, Twin-linked Shuriken Catapult]
+ Lord of War +
Revenant Titan [
FW] [Cloudburst Missile Launcher, Eldar Titan Holo-fields, 2x Pulsar, Revenant Jump Jets]