Just make sure you can get above RAC 100 on all of them. I have several rigs and I run about 5 projects per rig.
I have from 3 to 6 projects connected on different rigs.
And yes I know that i need RAC more than 100, but when I look on this site
http://www.gridcoin.us/Guides/BOINC/whitelist.htmthere is few projects with Less work than active hosts' projects. So now I don't know If I can connect to them or not.
So now, where is the truth?