Graphics settings question for older laptop

What is the best combination of settings to get the clearest images of units? I was playing as Byzantines against Shotel Warriors and I could barely distinguish what they were.

I have a DELL Precision M4800 with a AMD FirePro M5100 FireGL V

This was a 4v4 and I think my laptop couldn't handle close to 1600 population fighting so I want to keep settings the lowest I can but I dont want to lose the ability to see units better.

I have these mods:

Green smooth terrain with grid

advanced idle pointer

small trees

interactive build order guide

[guaymallen] - always red bushes

fish borders

no more plants

[teutons] main menu