Top tier for campaign and spider dungeon - due to recurring AoE.
CB very average, overshadowed by champs with buffs/debuffs/ None of her skills directly interact with anything CB does.
Arena - better than expected. Healing is rampant in Arena, so her A1 100% heal reduction is used tons. Her A2 anti-revive is useful against gorg and shaman teams (probably the two most common revivers i see in arena). Her A3 has to be timed just right to reset but its still an AoE with turn meter reduction. Being a Green champion does hurt her because most top tier arena champs are Blue which is strong against her however - so have to be careful in matchups.