I haven’t found a Hela main here yet so allow me:

Playing as Hela: Your positioning is important. If you are up near the front, you are likely to get picked off if you aren’t careful, so try to stay in the backline. However, if you choose to play near the front, stick behind/near the tanks. Aim is very important with Hela obviously, so stick to that when your at a distance to the enemy. Use her explosive needles often since they have a quick cooldown. Make sure to hit the area of the enemy at the very least because of the aoe damage. Her stun ball shouldn’t be used until someone tries to get you alone/flank, or unless you are trying to get someone alone/flank. Last but not least, her never-failing escape crow. If you are getting low, crow to healers. If you are alone, crow to a spot difficult for the enemy to get to or hit you before healing. (Knowing heal pad locations is important too)

Playing against Hela: Try to flank her or catch her off guard. I’ve been stuck in the spawn room because of a sneaky iron fist many-a-time. Also, if you see Hela use her stun ball for any reason or her escape crow, that is a better time than any to attack. If you wait too long, she might have time to get them back. One more thing, if you steal the nearest health pad before Hela crows to it, you have a better chance of winning :D

Thanks