Yuumi Support is ranked S+ Tier and has a 46.96% win rate in LoL Ultimate Spellbook Patch 11.24. We've analyzed 76511 Yuumi Support games to compile our statistical Yuumi Spellbook Build Guide. For items, our build recommends: Moonstone Renewer, Ardent Censer, Chemtech Putrifier, Staff of Flowing Water, Mikael's Blessing, and Shard of True Ice. For runes, the strongest choice is Sorcery (Primary) with Summon Aery (Keystone), and Precision (Secondary). The optimal Summoner Spells for this build are Placeholder and Exhaust. Starting items should include Amplifying Tome, Spellthief's Edge, Health Potion, and Stealth Ward. Yuumi's Best Spellbook Support matchups include Aurelion Sol, Ashe, and Zoe. Yuumi's Best Spellbook Support counters are Malzahar, Zyra, and Shaco.