For the dual lands, if we pick what's in range (Alara Reborn and before), the "safe bet" list is:
1. Treetop Village
2. Blinkmoth Nexus
3. Twilight Mire
4. Grove of the Burnwillows
5. Fire-Lit Thicket
6. Urza's Mine
7. Urza's Power Plant
8. Urza's Tower
9. Glimmervoid
10. Windbrisk Heights
Artifacts
Safe bet list for the artifacts:
1. Relic of Progenitus
2. Cranial Plating
3. Darksteel Citadel
4. Ornithopter
5. Springleaf Drum
6. Ethersworn Canonist
7. Arcbound Ravager
8. Expedition Map
9. Chromatic Sphere
10. Chromatic Star
White
Safe bet list for white creatures:
1. Aven Mindcensor
2. Soul Warden
3. Ranger of Eos
4. Soul Warden
5. Martyrs of Sands
6. Reveillark
7. Flickerwhisp
Safe bet list for legendary white creature:
1. Kataki, War's Wage
Safe bet list for legendary white planeswalker:
1. Elspeth, Knight-Errant
Safe bet list for white non-creatures:
1. Suppression Field
2. Path to Exile
3. Disenchant
4. Spectral Procession
5. Wrath of God
6. Steelshaper's Gift
Blue
Safe bet list for blue creatures:
1. Pestermite
2. Cursecatcher
3. Merrow Reejerey
4. Silvergill Adept
5. Glen Elendra Archmage
6. Wake Thrasher
Safe bet list for blue non-creatures (long list!):
1. Threads of Disloyalty
2. Unstable Mutation
3. Spell Snare
4. Remand
5. Gifts Ungiven
6. Cryptic Command
7. Annul
8. Thrist for Knowledge
9. Echoing Truth
10. Peer Through Depths
11. Piracy Charm
12. Telling Time
13. Pact of Negation
14. Repeal
15. Serum Visions
16. Sleight of Hand
17. Thoughtcast
Black
Black Creatures
Safe bet list for black creatures:
1. Dark Confidant (of course!!!)
2. Plagued Rusalka
3. Nekrataal
4. Shriekmaw
5. Withered Wretch
Safe bet list for legendary black creature:
1. Vendilion Clique
Safe bet list for black non-creatures:
1. Thoughtseize
2. Raven's crime
3. Night's Whisper
Ouch for black.....not much of a presence in competitive modern decks?
Red (Creatures First)
Red Sorceries
Safe bet list for red creatures:
1. Kird Ape
2. Hellspark Elemental
3. Avalanche Riders
4. Simian Spirit Guide
5. Keldon Marauders
6. Spark Elemental
Safe bet list for legendary red creature:
1. Kiki-Jiki Mirror Breaker
Safe bet list for red non-creatures (another long list!):
1. Blood Moon (a classic)
2. Seismic Assault
3. Smash to Smithereens
4. Volcanic Fallout
5. Shard Volley
6. Flames of the Blood Hand
7. Seething Song
8. Shrapnel Blast
9. Desperate Ritual
10. Tribal Flames
11. Molten Rain
12. Stone Rain
13. Lava Spike
14. Rift Bolt
15. Sowing Salt
16. Grapeshot
17. Shattering Spree
18. Flame Jab
19. Shatterstorm
20. Empty the Warrens
Green (creatures first)
Green Sorceries
Safe bet list for green creatures:
1. Tarmogoyf (announced!)
2. Wall of Roots
3. Noble Hierarch
4. Eternal Witness
5. Elves of Deep Shadow
6. Heritage Druid
7. Nettle Sentinel
8. Sakura-Tribe Elder
Safe bet list for green non-creatures:
1. Seal of Primordium
2. Chord of Calling
3. Might of Old Krosa
4. Summoner's Pact
5. Sylvan Scrying
6. Life from the Loam
7. Scapeshift
8. Search for Tomorrow
Multicolored and Hybrid
Safe bet list for multicolored and hybrid creatures:
1. Kitchen Finks
2. Bloodbraid Elf
3. Qasali Pridemage
4. Fulminator Mage
5. Knight of the Reliquary
6. Harmonic Sliver
7. Murderous Redcap
8. Anathemancer
9. Boggart Ram-Gang
10. Figure of Destiny
11. Orzhov Pontiff
Safe bet list for multicolored and hybrid non-creatures:
1. Jund Charm
2. Terminate
3. Zealous Persecution
4. Manamorphose
5. Electrolyze
6. Putrefy
7. Esper Charm
8. Shadow of Doubt
9. Maelstrom Pulse
10. Firespout
11. Blightning
Some of what I call 'safe vets' may come out in the remaining sets of the RTR block instead of in Modern Masters.
