evelyn buffs underwhelming
Having her mana regen only be buffed below 50%, is poor. Simply because you will still bottom out in the jungle and be unable to apply any pressure to lanes regardless of health. Mana cost reduction on her Q would go a long way.
The on hit change also does not help evelyn. She does not typically.build on hit items, and those on hit items she would build will o nly proc once and not twice due to h r icd.