Starting full spy is a BAD idea. It's better to start full forge and then convert straight to a Hansel build with level 3 guilds. Don't forget ally plunder
First of all as a pure spy, you have no hits per unload because you have no troops. If you're asking how many steals/assassinations/scouts per unload each are different. On general as a pure spy; you should get around 20-22 steals, 35-36 assassinations and 75-80 scouts.
You'll earn more gold with troop buildings and ally plunder. Keep the guilds you have but build tier 2 troop buildings as well.