That kind of low-risk, high-reward proposition means these Virtues are going to see play anywhere that the enchantment side is valuable, and the most widely-valuable one for Standard is Virtue of Loyalty
The best strategy is to shop around
Academy Loremaster Advanced Reconstruction Alabaster Leech Andradite Leech Anointed Peacekeeper Arachne, Psionic Weaver Aura of Silence Aven Interrupter Because I Have Willed It Boreal Elemental Callaphe, Beloved of the Sea Captain Eberhart Case of the Ransacked Lab Charitable Levy Charix, the Raging Isle Chatzuk, Mighty Guitarist (playtest) Chill Curse of Silence Defense Grid Derelor Disruptor Flute Dovin, Hand of Control Elderwood Scion Elspeth Conquers Death Emet-Selch of the Third Seat Esior, Wardwing Familiar Eureka Exiled Doomsayer Feroz's Ban Finale of Promise Fires of Invention Geist-Fueled Scarecrow Gloom Glowrider God-Pharaoh's Statue Gonti, Canny Acquisitor Gran-Gran Grand Arbiter Augustin IV High Seas Hinata, Dawn-Crowned Icefall Regent Irini Sengir Jade Leech Jubilant Skybonder Kaervek's Torch Kasmina, Enigmatic Mentor Killian, Ink Duelist Kopala, Warden of Waves Krallenhorde Howler Krosan Drover Loan Shark Lodestone Golem Lyse Hext Mindbreak Trap Monastery Siege Nogi, Draco-Zealot Paladin Class Primal Amulet Pursued Whale Reidane, God of the Worthy Rowan, Scholar of Sparks Ruby Leech Sapphire Leech Sphere of Resistance Sphinx of New Prahv Squeeze Syr Elenora, the Discerning Talent of the Telepath Tax Collector Thalia, Guardian of Thraben The Earth Crystal The Ur-Dragon
, : Create an X/X creature token of the chosen color and type, where X is the number of charge counters on this artifact
As such I would expect the first list to output about 9 mana in the first four turns from lands with the second producing only seven
As you'll be playing progressively larger creatures, this will ideally trigger each time you cast a creature
