Dirty_Player
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By the way, 0-1-2 is a very good option! But as an alternative, you could consider +5%/7%/10%.
And if it's a specialist in first aid, you could make it +10% (to the bonus, not to HP) per level! So, with an Expert in First Aid, we get:
Level 5 = +3
Level 10 = +4
Level 15 = +5
Level 20 = +6
Maybe "Gem and Co." will improve a bit.
Just don't make it "Heal All."
And if it's a specialist in first aid, you could make it +10% (to the bonus, not to HP) per level! So, with an Expert in First Aid, we get:
Level 5 = +3
Level 10 = +4
Level 15 = +5
Level 20 = +6
Maybe "Gem and Co." will improve a bit.
Just don't make it "Heal All."