Idea - How would Lifesteal works in different ways

This is idea on how lifesteal would work in i different way based on some items we currently have Instead giving standard Lifesteal the idea is based on what different types of users need.

Bloodthirster Restores health equals 10% phys damage done from basic attacks and critical strikes, which also generates up to 150% AD shield (does not decay)

• Healing is focused on Shield part.
• Benefits Marsksmen and Critical Strikes users
• Critical Strikes increases healing and shielding
• Includes Critically Strikes on Abilities
• Healing and shielding is affected by armor

Death's Dance 10% of phys damage done restores health. Kill or Assist restores 40% AD up to 80% AD Health based on your missing Health

• Focused on Awarding for scoring Takedowns on Enemy Champions
• Works equally on all types of phys damage equally ( also critical strikes, abilities, on hit effects, items and so on)
• Healing is affected by armor

Blade of the Ruined King Restores 20% AD health on Hit

• Benefits single target On-hit Effect Champions
• Includes abilities that apply on-hit effects
• No extra benefits on Critical Strikes
• Healing is NOT affected by armor

Ravenous Hydra Cleave restores 10% AD (30% AD on Crescent Active) Health on hit for each damaged unit

• Benefits from multiple damaged enemies On-hit
• heals equally from all damaged units on basic attack.
• Includes abilities that apply on-hit effect
• No extra benefits on Critical Strikes
• Healing is NOT affected by armor