After reading a lot of this forum, it seems like many people feel that the tiny units that follow your Demigod into battle are too weak, simply a distraction, a way to get more cash, and will never really affect the flow of a battle.
This isn't completely true. Some of them are laughable and I have to agree that they exist only to get the other side more cash, but not all of them.
Here's a list of the various creeps and what I'v seen them do so far. Their damage as listed is an average on an unarmored target (more on this later)
The Tower of Light: The defense both sides employ are good enough to stop a single Demigod getting them down early. They hit for about 200, and seem to increase their damage if there are many of them together. They also take a while to destroy.
The Soldier, tiny dudes with hammer: These guys are a real joke. They get one-shot by everything, and hit for 12, which will never kill anyone since Demigods start with 1K to 2K health.
The Archer, skinny dudes with bows: They are a ranged version of the Soldiers. No health, and deal 13 damage, they'l never kill anyone either.
The Healer, fat dudes on chairs: These ones make a difference. They heal allies for 240~260, seem to prioritize Demigods, and hit enemies for 95~100. They also have a fair amout of health.
The Catapultausaurus (lol): These guys also make a difference, seeing as they hit for almost 400 and have a hell of a long range.
The Angels, flying dudes: These are non-entities as well. They hit for 40, but don't hit fast, have no health, and show up late game when 40 isn't going to kill anyone
The Giants, big rock dudes with big clubs: These guys come out neer the end of the game and hit for 400 per swing of their big clubs, they squash the lesser creeps, they hit pretty fast and are hard to kill.
It's important to remember that all these damage values are BEFORE ARMOR. This means that on a level 5 to 10 Rook who's gotten some armor items (to about 50% reduction), all these values are cut in half which is why damage could use to be upped by a fair amount even on the hardest hitting creeps.
So it's really not too bad. There's only 3 sort of creeps that are totaly useless, the soldiers, the archers and the angels.
There's many ways these cull fill roles on the battlefield. Simply upping their damage is an option, or being unable to walk through soldiers (which would make them act as line blockers). Giving archers a slowing attack could help. I don't know about the angles though, probably just increased damage. Or giving them a charge where they would hit enemies in a line for ~200.
The problemwith Towers is that by the time you get to the last row of towers, they aren't hitting you for much anymore. Maybe giving towers more damage the closer they are to the stronghold, or putting more powerful towers there so you can't just waltz in and ignore them as you pound on the Stronghold.
But overall my main problem with the creeps is... The Rook. He is too powerful compared to creeps (not to other Demigods) his normal attacks smashes rows of them, his hammer will decimate an entire push, and his high armor and huge healthpool make their attacks do nothing to him.
Thank you for your time.