Virtual Machine optimization'

Hello im new to those type of tecnology coding, i learned coding some time ago i use python im developing a tribalwars bot right now pure http client. Just as introduction.

Im not new to botting but i started to make my own things short time ago, i have now like 15-20 eve bots but not my software i use macrolab.

my question is how much resources you use per virtual machine or if you have any way of optimize it?
right now i use
x1 core
x1 cpu
1gb ram
768MB gpu ram

for each virtual machine and bbots works smooth with eve.

Is this fine?