[Endoperez]

You can try lessening 'Opaque' from the preferences.

This should be pretty quick thing to mod. Maybe you would give some ideas... or try to mod those graphics yourselves.

Many nations share the problem, and if a mod changing every nation would be made some kind of runes/symbols could be added to the tgas of the more powerful casters.
And what colors would you prefer? I haven't got any difficulties myself, with Dom:PPP...