You could get a team of like 7 people have 2 on 1 team 1 advertising "we have a war join my clan" and the other guy staying the the clan portal so it doesn't time out. Have everyone else on the other team waiting at the portal for people to come in (have items not safe) then they will be lured and come in and you kill them.
i know this isn't the red portal one but its a good one
You could get a team of like 7 people have 2 on 1 team 1 advertising "we have a war join my clan" and the other guy staying the the clan portal so it doesn't time out. Have everyone else on the other team waiting at the portal for people to come in (have items not safe) then they will be lured and come in and you kill them.
i know this isn't the red portal one but its a good one
I seen plenty of rares on doing that lure you don't need 7 people if your confident with less people all you will need is like 4 or 5 too. 1 advertising 1 waiting and 2-3 killing.
Edit: you could just do like if you get you keep deal with them too