Runes:
Dark Harvest > Taste Blood > Eyeball Collection > Ultimate Hunter Presence of Mind > Cut Down
Summoners
or 
Skill Order:
R > Q > W > E
Build Order:
> 
> 
> 
> 
> 
Enjoy being the ultimate PERSONA for anyone.
No fair. After comparing Yuumi with a Persona, I feel tempted to try her out.
Personally, I like Ancient Coin over Spell Thief's because you don't actually need to get off of the carry in order to pick up the coins. If they move close enough, you automatically pick it up. I think this is more reliable because if you accidentally hit a minion with your Q, you aren't missing out on gold. The mana coins and her passive do a lot to support her mana consumption without needing to invest runes or other items into mana sustain.
