I have a suggestion for stick empires, to have more defense.

Castle Pikeman

200 gold
100 mana
Same damage as Spearton, has a splash damage radius like the castle archer.
Basicly what he does is, he hands out in like a window or somthing and holds a long pike and attacks any unit
near the entrance, this is to stop units camping in the corner -_-. He cant reach units attacking the statue.

Upgrades: 400 gold 250 mana.
More Damage.

If you want this could be on chaos too.

same damage, cost, they just look different, its that white skeleton mage guy but with green energy
tentacles.

I don't see the hiding in a corner thing too much. Certainly not enough to warrant an entire new upgrade, to what they could possibly just fix? :)
Though the pikeman sounds cool. Just doesn't seem like there should be a role for defending a corner...

You never know what use it could be until you test it, there are alot of rushing players in stick empires.