Read the Release_Notes
Release announcement from one of the more than 33 variations of 'LinuxMint'
IMO and in 8 years of solely Linux, 50G for / is over-kill.
yohey03's reply doesn't show a /home partition so, that's "under" /, I assume from the omission.
And seems ok to do so here. Then if true, his is at 50G is fine.
With a separate /home...
25G / is sufficient, again IMO.
And that's how'd I'd possibly layout a Server
, but LM doesn't make a 'server edition'
because it's a Desktop Operation System.
No matter the architecture, no matter the Desktop Environment,
LM 17.x is Ubuntu 14.04-based
under the hood and therefore LTS.
I boot legacy (I have 'on-demand' UEFI/legacy BIOS) for 3 years
and soley LM for close to 5 years total. Two'ish years this
25 G for / "tops".
The other partitions mentioned, I can't speak to those.