like 2 range : 3 etc......

2:1 range:armour ratio is the best so it will be 7:3 cruisers, 10:5 frigates and 20:10 fighters

same for earth mars and fantasy

thanks

Socialmisfit1 has a good strategy, however it is also worth considering the length of the intended battle and the level of the target for your troops. This is because in a full round where range, damage and armoured units have attacked, the damage units will have had the highest attack points and so it is best to incorporate these units in to your army, because sometimes attack is the best form of defence. Also damage units are useful for conquering colonies with, which have -20 soldiers, as they cost less to create and inflict more damage therefore helping at the start of an era.