Harmony - Troop Symmetry

I did the same with manticores – the regular one just flies, the improved one has animal poison, and the alternate one has stunning, but I didn't give the giant killer ability. I gave the dragons of light skills that made more sense (copying the unicorn isn't that strong if you don't give one of the dragons both blinding and child of light). If these dragons are children of Erathia, then having child of light is very appropriate, according to the description: "Erathia doesn't have 'dragon' breath, but his noble wrath makes his eyes flash with blinding light" – hence the blinding, and if you don't like the analogy with the unicorn, it's better to change it somehow. I tried using blinding with pike in an elf army – it works with sworn enemy, but not with blinding (or maybe I just didn't see it – it all depends on random chance). And here's a combination I came up with: cleansing + pike = flies over the enemy army and removes all positive effects from everyone.