Lag Reduction

This will mostly help online, long battle games

Translucency=yes (note appears in smoke particle rules as well)
Translucent=yes

This tag makes animations look "washed out" removing it, allows animations to look better (overall) and makes game run faster

MaxDebris=
MinDebris=
DebrisAnims=

Now some say it has no effect .. but if you play online it for a while and then someone quits or lots of stuff blows up at once it lags a lot, without debris it runs somewhat smoother.

However there is a workaround if you wanted debris for say singleplayer missions, offline play

1. Map file editing
2. DetailLevel = 2 (you will thus be able to use graphic options in theory to turn off debris)

Voxel debris may also cause lag but it seems to be considerably less

Cloak Generator = lag generator, you could reduce cloak delay to like say 0 for instant and also operate on a smaller radius

ParticleCap=
MaxEC=

Play around with single digit numbers for quicker results in regards to gas clouds, railguns, sparks

Combat Lightning

Don't use massive % unless say 1 unit as multiple lags

Also if adding lightning to buildings best to use a alpha image effect

http://modenc.renegadeprojects.com/AlphaImage