Does grand conquest increase summoner and or ally supports?

yea it does fam

Just remember SS/AS is based on maps cleared and not kills so GQ isn't the best way to get them you need 80/60 maps cleared at 35+ for SS/AS for S ranking, I'm pretty sure the best way to do so is TT since it's a fairly low SP cost for multiple maps you can run lvl35 maps and be done with 16 runs of it so long as your unit/s doesn't die, then GHB hard mode since they are free, then Chain Challenge but they are very high SP cost so I wouldn't recommend CC