If you can get a chain with a player in your time zone then chain to 100 is possible without gems as I did, yes I have 150 stamina kept it there after last PVP's. You only need to hit history to see when you have been hit and wait the 10mins so no constant refreshing yes you loose points but gain more in the hit back, finished approx 330ish gem free so I say not bad and a good event