I have found a way to POSSIBLY get every vip using one VIP.
So you buy one VIP level to 100 then you give it all level X runes it should be able to complete the dungeon. Then you get the cells from the VIPs. If one of your teammates does the same thing then theyll have the cells for your VIP then they craft their monster with elementium so theyll have 100 cells. You do the same thing with ur monster and then you guys request over and over and you and your teammate will get another VIP.
This only works if you can request VIP cells though. I wouldnt know since I dont have a VIP but if this works then it would be great. But take advantage of it.