The other two are Uro, Titan of Nature's Wrath and Tatyova, Benthic Druid
The first scenario seems like it will produce more damage but the second is going to net me more life

River Song | Commander | Abe Sargent Commander (1) 1 River Song Creatures (18) 1 Archmage Emeritus 1 Augur of Bolas 1 Boldwyr Heavyweights 1 Canal Dredger 1 Eager Construct 1 Eligeth, Crossroads Augur 1 Guttersnipe 1 Flux Channeler 1 Hired Giant 1 Junktroller 1 Keeper of the Cadence 1 Myr Custodian 1 Noble Benefactor 1 Reito Sentinel 1 Storm-Kiln Artist 1 Spark Double 1 Timestream Navigator 1 Transplant Theorist Planeswalkers (3) 1 Jace, the Mind Sculptor 1 Jace, Memory Adept 1 Jace, Unraveler of Secrets Instants (21) 1 Anticipate 1 Chaos Warp 1 Counterspell 1 Deflecting Swap 1 Dig Through Time 1 Dissolve 1 Experimental Augury 1 Fierce Guardianship 1 Impulse 1 Jwari Disruption 1 Magma Jet 1 Memory Drain 1 Negate 1 Peer Through Depths 1 Pongify 1 Prismari Command 1 Silundi Vision // Silundi Isle 1 Slip out the Back 1 Spell Crumple 1 Supreme Will 1 Thieves' Fortune Sorceries (5) 1 Advice from the Fae 1 Cleansing Wildfire 1 From the Ashes 1 Ingenious Mastery 1 Mizzium Mortars Enchantments (2) 1 Curiosity 1 Lost Isle Calling Artifacts (12) 1 Cellar Door 1 Commander's Sphere 1 Decanter of Endless Water 1 Everflowing Chalice 1 Reito Lantern 1 River Song's Diary 1 Sol Ring 1 Sonic Screwdriver 1 Stonespeaker Crystal 1 Thran Dynamo 1 Vessel of Endless Rest 1 Worn Powerstone Lands (38) 7 Island 6 Mountain 1 Castle Vantress 1 Command Tower 1 Crystal Grotto 1 Demolition Field 1 Desolate Lighthouse 1 Field of Ruin 1 Ghost Quarter 1 Isolated Watchtower 1 Izzet Boilerworks 1 Karn's Bastion 1 Molten Tributary 1 Otawara, Soaring City 1 Path of Ancestry 1 Prismari Campus 1 Restless Spire 1 Rivendell 1 Silverbluff Bridge 1 Steam Vents 1 Temple of Epiphany 1 The Grey Havens 1 Training Center 1 Trenzalore Clocktower 1 War Room 1 Witch's Clinic 1 Zhalfirin Void And there we go

Depending what deck your opponent is playing, this can shut them down in so many different ways
Investment Guide Sobble, known as the Water Lizard Pokmon, occupies the #816 slot in the Pokdex and made its debut in the eighth generation of the Pokmon series
While its a bit slower, Path of Ancestry is a great choice for any tribal deck, thanks to its scry ability