The freckles are a great touch
I fear they may be picked on at school though...
These look great as well. Maybe one suggestion: the lips appear somehow too small.
The original is ἀκοντισταί which translates as javelin-throwers. We can name the javelineers as Malian rather than slingers, and keep the slingers as gymnetes. I just wanted to offer a local name which may sound better than a generic class.
I propose to "localize/specify" slingers as Malian Slingers.
Historical reference:
https://www.hi.uni-stuttgart.de/wgt/ww-one/Start/Bleed_White/Technology_and_Science/ww1_ger_08_03_02.html