Most players in the game right now haven't attempted the raid mostly because even with the Guided Games feature it would require waiting almost an hour just to get into a match. Here is an idea. Make large scale raids, almost like assaults by a fire team of 12 people that is match made. This raid is more focused towards action with a level of mechanics that are punishing but possible to do with only maybe 3 players doing said mechanics. Have large scale raid bosses, vehicle sections with the tanks or even more vehicles. Bosses are spongy because of the amount of players in the team. Each encounter rewards you with one item but there is a weekly lockout on items. Focus on the action and flow of combat with some light puzzle mechanics thrown in. This is focus for fun challenging ways to gear up and to teach players about Raid mechanics.