More Dark Eldar Questions

If I have a raider with Wyches on it, can it assault a group of Space Marines. If it does, do all the Wyches get a chance to attack? If they do, do they get bonus' for charging?

If the Marines then strike back, is that against the raider of the Wyches?

If the Raider has scythes on them that wound anyone who assaults it in melee, does that effect the Marines too?

Yer that wouldn't be op. If u do I'm putting a chaos lord in a rhino and putting he's daemon weapon out of the shooting hatch and cutting u on the way by. No troop carriers or tanks or skimmers can get in to close combat and ur open top let's u shoot only also u would be or the head of the marines u couldn't reach.

Not sure I get the question... The only vehicles that can assault are walkers. Some vehicles (tanks) can tank shock troops or ram other vehicles; that's it. Your wyches if they want to assault have to disembark and they can charge (open topped gives you the opportunity to move the raider 12, disembark 2 inches away, run and charge !)

I was just trying to figure out what so many army lists have Grots on Raiders without someone holding their hands. Grots cannot get off Raiders without support from an Independent, so I was wondering if there was a rule I was missing somewhere.