Today the Valkry is still not being used a lot, here is some of my suggestions:
1. Next update should have level 5 and/or level 6 Valkry update
2. Valkry now has the probability to take a hit with extra damage (like 10% chance to has a double damage or has a double damage every 5 normal hit)
3. The chance of extra hit, or the damage of each extra hit depends on the level of Valkry
4. Giant Bomb and small bomb take less damage on Valkry (like x0.8 or x0.75)
5. If enemy's heros are near Valkry(like within 7 tiles), Valkry's favourite target will be switch to heros first.
In terms of the viewing: When Valkry taking a hit with extra damage, her axe will getting Golden (or any cool colour) and bigger at that hit. And she will yell loudly and bravely (if you open game sound LoL)

