Anyway, great strategic game.
But will someone care to list the health and damage of the units?
What I know: (thanks giant)
Swordwrath: 34 damage (maxed)
Minions: 23 damage (regardless)
Achidonians: 9 damage (maxed)
Giant: 160 damage (regardless)
Your unit does 3x damage if it is controlled. Apparently it has 2/3x defense, though I need confirmation on this.
I personally think speartons are quite useless though, other than blocking arrows. But a zigzagging swordwrath does the job even better, at 3/8 the cost. But maybe they're more powerful in hard/insane mode, since you can only upgrade the swordwrath damage up to a certain point.
No!!! Magikill are great for sending out cheap minions. You'll be surprised how deadly large numbers of minions are against giants and such. But the bad thing about magikill is they fill up the damned unit max bar VERY fast, stopping you from building normal units. So my advice for magikill is to save gold and space for them (maybe leave 2-3 slots), then send them out, since minions are not restricted by the unit max thing.