Here's a revision I've been working on for 40k Chaos Daemons houserules. Comments/suggestions appreciated. Thanks.
Here's the updated special rules section for 1.9;
Daemon- Grants Eternal Warrior, Fearless, Daemonic Assault
Daemonic Assault – Chaos Daemon units are not deployed normally. Instead, each unit is deployed through a Warp Rift at the beginning of their first turn and makes a standard move immediately, measured from an edge of a Rift template. Units not deployed first turn through a Warp Rift must arrive via deep strike using standard reserve rolls.
Warp Rift– A Daemon army always starts with a number of Warp Rifts based on the army point total. If the army is up to 1000 points, it starts with one rift, 1001-2000 points the army starts with two rifts, etc. Before deployment, place a Warp Rift anywhere within 12” of the owning players’ board edge [use a 5” diameter piece or template to represent the rift]. Warp Rifts must be placed at least 6” apart. After all rifts have been placed, scatter each one D6”. If the rift lands in impassible terrain, move it the minimum distance, 1” away from the terrain. One additional Warp Rift can be purchased at the cost of 40 points. A Warp Rift counts as impassible terrain, but does not block los.
Heralds– Heralds count as unit upgrades and do not take up a slot on the force organization chart unless they are given a chariot. Chariot mounted Heralds count as an elites choice. Up to two Herald chariots can be taken per Elite slot. The following units may take a Herald (must be same type as the unit [Khorne, Nurgle, Slaanesh, Tzeentch]); Bloodletters, Plaguebearers, Daemonettes, Horrors, Bloodcrushers, Plague Toads, Flamers, and Seekers. Max one Herald per unit.