If you prefer faster or slower battle spacing, you can set factors in the first section of battle_config.xml in any mod you like. High numbers mean faster battles. I understand it as a multiplier for a chance for a succesfull hit (not necessary a damage to the unit, only if attack missed or not), I tried quite a couple values from 0.1 - 100 but the only change was how quickly units died, but it happened at the same ratio between units. Here are some examples of these factors:
Vanilla :
SS :
EB II :
EDIT I forgot to say that changes are compatible with saved games. You can change it back anytime you want.