You should always make them linked, not full cloned!Quote:
What if I made them linked and not cloned?
If they are fresh you can get some more into 60 GB but as soon as Riot
deploys a new patch and clones start updating themselves your system may run out of space, the VMs crash and your host OS might get problems, too.
Also I would advise you to don't fill your SSD 100%. They need some free space to work (wear leveling). May also have influence of the performance of the SSD.
So if you want to run more best option would be to get a second SSD (or swap your to a bigger one). Samsung 840 EVO/Pro are doing the job perfectly.
The rest of your PC is ready for 12 VMs. Is your descision if you want to invest that money ;)