lay siege to the dragonbane keep
it was the soup but it changed
on my level 60 alt does not scale
As long as there are a few other 70s there when you go you will be fine. I’ve done the event on 12 of my sub-70 guys this week and a few of them died a couple of times but that was mostly because I got greedy and tried to tag too many mobs. If dying worries you only tag the ones that are already well beaten on by the level 70 players.