The other option for leading the deck is Arthur, Marigold KnightArthur, Marigold Knight, which offers an interesting way to cheat out more members of your team when you move to combat
Jumping from 3 mana to 6 is pretty powerful, and Gwenna lets you activate the abilities of creatures
Its reliable and efficient, but not versatile, if youre a super fast combo deck, this jumps up several ranks, but even for slower blue decks, this tends to make the cut for me

Approach of the Second Sun Day of Judgment Defiant Strike Divine Gambit Ephemerate Gift of Estates Gods Willing Mana Tithe Revitalize Swords to Plowshares Teferi's Protection Blue Sun's Zenith Brainstorm Compulsive Research Counterspell Memory Lapse Mind's Desire Negate Opt Strategic Planning Tezzeret's Gambit Time Warp Whirlwind Denial Agonizing Remorse Crux of Fate Dark Ritual Demonic Tutor Doom Blade Duress Eliminate Inquisition of Kozilek Sign in Blood Tainted Pact Tendrils of Agony Village Rites Chaos Warp Claim the Firstborn Faithless Looting Grapeshot Increasing Vengeance Infuriate Lightning Bolt Mizzix's Mastery Shock Stone Rain Thrill of Possibility Urza's Rage Abundant Harvest Adventurous Impulse Channel Cultivate Harmonize Krosan Grip Natural Order Primal Command Regrowth Snakeskin Veil Weather the Storm Despark Electrolyze Growth Spiral Lightning Helix Putrefy Are the Japanese Mystical Archive Cards Available in Foil
At least until someone gives me the password to EDHREC
Resolute Reinforcements Rarity: Uncommon TYPE: Creature SUBTYPE: Human Soldier CMC: 2 Mana cost: USD: $0.19 EUR: 0.14 TIX: 0.03 EDHREC RANK: 7111 (1/1) Flash (You may cast this spell any time you could cast an instant.) When this creature enters, create a 1/1 white Soldier creature token