Tip overview

Willo's Dead Zone ability is very effective against 'local healing' this includes grovers healing, Grohk's totem and similar things. Dead zone will prevent deployables from being effective and will force champions like Grover to move out of the zone.

Do not underestimate the effectiveness of getting really close to them and flying straight up, flickshotting Blastflower down onto their heads. Try to use this against Flankers with exhausted mobility and other Damage champions.

Deadzone is not completely ground-based like Damba's gourd or Tyra's fire. It works like Viktor's ult which means that it can be blocked with shields as long as you're not exposed to the middle.

Willo is heavily countered by mid-long range fast projectile and hitscan champions. As Willo in this situation, play carefully by denying line-of-sight of those champions and if you want to trade dmg with them peekshot from cover.

If Willo uses her skills wisely, you won't be able to beat her up close. At first you should find higher one than her position that you can suprise and chase her out of. Willo is not very good at dealing with flying or high mobility enemies.