The 40k Custodes now have a proper Codex, complete with options in every slot- and Forge World finally released 40k rules for all their Legio Custodes units, which means grav-tanks, uber-Dreadnoughts, specialist long-range infantry (praise the Emperor!), disintegration cannons welded to spears, and arguably the most beautiful airborne unit in the whole game. Just watch out for horde armies that can pour enough dakka into you to force unsaved wounds, or tarpit your super-troops through sheer numbers. However, their innate resilience compensates for their low numbers, and if you play your cards right, you can pull off some crazy stuff even when you're outnumbered. When even an all-Paladin Grey Knights force consistently fields larger armies than you, every lost model will be sorely felt. In any case, the Adeptus Custodes function as the high-profile, multi-wound elite army, with absurdly strong profiles backed up by equally steep point costs. Maybe you want profiles for your basic infantry that make Terminators envious or maybe, just maybe, you just like the idea that nearly all of your dudes are extremely fucking hard to kill.
Maybe you like gold, or perhaps you have the 30k version of the Custodes and don't want to pay for another army for use outside of Horus Heresy games.
