I've always had a soft spot for the Alpha legion almost the tragic unsung heroes of 40k. I'll be taking part in Deep Strike Radios getting ready for 6th Edition challenge and i'll be playing them out of Codex space marines.
Note my troops will have a uniform look on a unit by unit basis meaning the exact same looking body parts and this isnt a nasty armed and grime encrusted chaos legion this is a newly re-armed Legion from whatever deciet, lies, and trickery to get the right tools to accomplish the emperors true mission
1st up My Sternguard Star (Efreeti Stealth Squad)
2x hvy flamer
Mathias Herzog (Pedro Kantor)
Librarian - Force Dome, and hvy flamer spell or null zone
droppod or redeemer depending on game
Only the Libby and the Sternguard will have the chaos back packs. I have a tac squad that will all have MK 8 Errant armor, some snipers with a Telion stand in cultist (Rin Farrah from soda pop minis) and a Contemptor with a Kheres AS and a Gravity gun, and some Tartaros Termies for my Lernaeans