i think the elite honor guard are the odst of the covenant
i was playing 2v2 as PoR and i had about 30 , now i was trying to get rid of them so i could build a scarab and a bunch 30 engineers to go along with , so im trying to get rid of my elites so i send them to forges base to get killed , im just managing my base awhile , so i look back over at my base and ive got like 20 elites left over all attacking 2 grizzlies , by the time i had about 5 elites left over , forge already sent in 2 more grizzlies .
but thats not all , the pretty neat thing to do with them is to get a flying prophet , and research for like 50 elites locked in a base , then when you've got your 50 elites just go to your enemies base , and start circling his base with your prophet while at the same time releasing all your elites through the grav lift , that way they fall from the sky ,
even better they get a sheild , invisibility , they shred up infantry , and can kill tanks in swarms