I've been trying to figure out how people are doing just one damage, even if I use a single 2* unit, I still do 4 digit damage?
A single 2* level 1 unit, using 1 raid point will do a couple of hundreds (depending on type effectiveness & skill procs), usually 200+ to 300+. Perhaps you're not using a level 1 unit?
As far as I know, "1" damage is only on seed bearers