Before we get started, my position on balance.
I think all useless skills should be brought up to tier 1 levels. And the things people complain as overpowerd (UB tier 1 skills etc...) should be left alone. It will be easier to balance this way. If all the skills are so good that you want them all, that it a good thing.
eg: UB does have useless skills too, like bestial wrath, which should be improved to be competitive with the other skill choices.
On to Queen, her skills that need help (how I would balance her)
1a) Entourage (this is a 2 part fix)
Too weak for what it gives you. You are better off with morale, when you consider the damage output you get from morale for 6 idols + 4 shamblers. Although it does give you shmabler life, shamblers are ranged, and you can buy items so it is of questionable use to pick it for this reason.
However, we can make it an interesting, unique and desirable skill without simply upping the damage output.
Lets say that every point in entourage lowers the delay on mulch explosion by 1/2 second. (it is 2 by detault) That is right, when you mulch it is set to take 2 seconds for the explosion to go off.
1b) Mulch (this is part 2 of the entourage fix)
Good skill, but it could do more and give QoT a uniqie ability.
I would say getting caught in a mulch explosion should also remove all positive effects. For 3,4,5 seconds (mulch 1,2,3). We can call the icon effect "Contaminated" that shows up in you negative buffs.
This is the opposite of negative debuff removal, and I think is the perfect flavor for Queenie and brings a unique ability to the game.
2) Compost
Terrible skill but really really cool effect.
QoT has a problem, mana. Compost should up her closed mana regen. (base is 100% regen when closed)
Compost I closed Mana regen increases 11,22,33 per effect level
Compost II closed Mana regen increases 22,44,66 per effect level
Compost III closed mana regen inreases 33,66,99 per effect level
Inbetween battles, if you are left alone to farm, you can regen your mana faster.
3) Spikewave: Add Interrupt on hit, ever demigod should have an interrupt. (yes even Occ). This skill would still not be as awesome as boulder roll and it is a comprable skill. Although you can interrupt multiple enemies, It gets harder to interrupt on purpose the farther the target is.
4) Uproot: Easily the worst spell in the game... and the double whammy is ground spike allows QoT to eat towers faster then anyone anyways.
To fix
Mana cost to 400 across the board (like rook's towers)
Also stuns afftected tower for 3,4,5,6,7 seconds per skill level.
Each point also increases shambler range by 1 yard
Now it is a siege skill.
5) Goddess of thorns
Remove the goofy 15% crappy acclimation effect. I mean really, it doesn't even work with shields on! We are going to rework this effect for closed mode.
Remove the current 35 damage reflection we are going to rework it for open mode.
New benefits of this skill.
Ground Spike + Spike wave effects increased to last 7 seconds (up from normal 5)
When closed, mana regen is 200% and armor bouns is 20% (up from normal 100% and 10%)
When open, thorn aura does 35 damage to anything in range (like a poor ooze effect, but with larger radius) 5% increased attack speed over closed mode (up from 2.5%)
This would make QoT a tier 1 demigod without making her imba.