Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

Or do the GW elves strike at initiative due to no double stacking?

To answer this, regardless of the number of times you have ASL, it still only effects the unit once. In the case of elves, it would cancel out their ASF. They would strike at Initiative and ASF would not grant and rerolls it might usually grant.