Researches

Military- All 

Upgrade Military- unlock "quick swap" to level 1"

Military Command- unlock "breakthrough"

Familiars- unlock "pact 3"

Familiar Battles- unlock "familiar battle slot III"

Buildings to maximize

1 Infirmaries (5% army max HP)

15 Manor (300% speed training and 30% army attack)

1 Barracks (10% army defense)

Maximize Workshop (must use an extra accessory gear)

Heroes to develop to the gold grade and be placed on the Wall Station

Focus on Army Attack Heroes: Bombin Goblin, Rose Knight, Watcher (special hero gotten by doing hell events), and Chaos Dragon (special hero gotten by doing hell events)

PS: if you don't have 5 heroes that give army attack boost altogether (because mostly are p2p), put: Bombin Goblin + Rose Knight + 1 hero for infantry attack boost (Demon Slayer) + 1 hero for archers attack boost (Snow Queen) + 1 hero for horses attack boost (Child of Light) for a strong f2p wall composition. 

Familiars to develop to elder stage

Tempestite (Pact 2A)- grants 20k random t1 troops

Strix (Pact 2A)- increases infirmary healing speed and delays the altar execution time

Magus (Pact 3)- increases altar boost duration

Moole Shaman (Pact 3)- increases infirmary capacity and gives infantry attack boost

Noceros (Pact 3)- increases cavalry attack boost

Trickstar (Pact 3)- increases ranged attack boost

Talent Points

Maximize the talent points upgrade bar in the following order:

Squad Offense I, Squad Health II, Squad Health I, Ranged Offense III, Cavalry Offense III, Infantry Offense III, Ranged Offense II, Cavalry Offense II, Infantry Offense II, Ranged Offense I, Cavalry Offense I, Infantry Offense I, Squad Defense II, Squad Defense I

Gears

The following are strong F2P options for a solo trap war set, from the strongest to the next best substitutes. Use the gears that enhance the majority of your troops' composition. So, if you have most cavalry + archers, for example, use the recommended options that enhance this troop type specifically. The gears must be improved with jewelry. Recommendation (3 jewelry set): 1 for infantry ATK, + 1 for ranged ATK, and + 1 for cavalry ATK.

Helmet:

Serpent Helm (infantry ATK 42%, ranged ATK 42%, infantry HP 21%, army defense 35%)

Bumblehelm (cavalry ATK 42%, ranged ATK 42%, army HP 28%)

Beast Helm (cavalry ATK 35%, infantry ATK 42%, army HP 21%)

Armor:

Firewall Plate (infantry ATK 28%, cavalry ATK 42%, army HP 21%)

Hardened Carapace (ranged ATK 35%, cavalry ATK 35%, army defense 14%)

Hedonic Cuirass (infantry ATK 35%, cavalry ATK 35%, infantry HP 42%)

Legs:

Storm Tasset (infantry ATK 42%, cavalry ATK 42%, army HP 14%, army defense 28%)

Blizzard Pants (ranged ATK 42%, cavalry ATK 42%, army HP 14%, army defense 16,8%)

Dragon's Talon (infantry ATK 28%, ranged ATK 42%, army HP 21%)

Main-Hand:

Skullcrusher (ranged ATK 21%, army ATK 28%, infantry defense 35%)

Kraken's Anchor (cavalry ATK 35%, infantry ATK 35%, infantry defense 18,2%, cavalry HP 18,2%)

Nectar Orb (ranged ATK 35%, cavalry ATK 35%, cavalry defense 14%, ranged HP 14%)

Decadent Sword (ranged ATK 35%, infantry ATK 35%, ranged defense 14%, infantry HP 14%)

Frostwing Greatsword (infantry ATK 28%, cavalry ATK 28%, ranged ATK 17,5%)

Off-Hand:

Eternal Codex (ranged ATK 49%, cavalry ATK 28%, cavalry HP 28%)

Venom Blade (infantry ATK 35%, ranged ATK 35%, army HP 14%, ranged defense 14%)

Spirit Axe (infantry ATK 35%, cavalry ATK 35%, cavalry HP 14%, army defense 14%)

Dragon's Fist (cavalry ATK 30,8%, army HP 28%)

Dark Aegis (infantry ATK 14%. Army ATK 14%)

Winter Mitts (ranged ATK 14%, infantry defense 45,5%, army defense 35%, army HP 35%)

Accessory:

Ambrosial Cup (infantry ATK 35%, ranged ATK 35%, infantry HP 21%, ranged HP 21%)

Polar Ring (cavalry ATK 35%, ranged ATK 35%, cavalry HP 21%, ranged HP 21%)

Book of the Dead (infantry ATK 35%, cavalry ATK 35%, cavalry defense 28%, infantry HP 21%)

Blight Ring (ranged ATK 19,6%, army defense 21%, army HP 21%)

Awaken Familiars to be placed at Wall Station

'In the case of an infantry phalanx solo trap'

Evil Weevil (Pact 2A)- At the start of the battle, increases Army HP by 15%

Aquiris (Pact 1B)- At the start of the battle, reduces the enemy's Army HP by 15%

Terraspike (Pact 1B)- At the start of the battle, reduces the enemy's Infantry max HP by 40%

'In the case of a cavalry phalanx solo trap'

Evil Weevil (Pact 2A)- At the start of the battle, increases Army HP by 15%

Aquiris (Pact 1B)- At the start of the battle, reduces the enemy's Army HP by 15%

Jaziek (Pact 1A)- At the start of the battle, reduces the enemy's cavalry max HP by 40%

'in the case of a ranged phalanx solo trap'

Evil Weevil (Pact 2A)- At the start of the battle, increases Army HP by 15%

Aquiris (Pact 1B)- At the start of the battle, reduces the enemy's Army HP by 15%

Magmalord (Pact 1A)- At the start of the battle, reduces the enemy's Ranged max HP by 40% 

Troops Composition

OPTION 1

Infantry phalanx/ cavalry wedge Army lineup

4m infantry and 4m cavalry T2

4m archers T3

500k infantry and 500k cavalry T4

or

6m infantry and 6m cavalry T1

3m archers T2

or

5m infantry and 5m cavalry T2

3m archers T4

OPTION 2

Cavalry phalanx Army lineup

4m archers and 4m cavalry T2

4m infantry T3

500k archers and 500k cavalry T4

or

6m archers and 6m cavalry T1

3m infantry T2

or

5m archers and 5m cavalry T2

3m infantry T4

OPTION 3

Ranged phalanx Army lineup

4m infantry and 4m archers T2

4m cavalry T3

500k infantry and 500k archers T4

or

6m infantry and 6m archers T1

3m cavalry T2

or

5m infantry and 5m archers T2

3m cavalry T34

Artifacts

As a priority, focus on developing the artifacts with a 'golden aura' (gold grade) first. Once those are complete, move on to the purple ones. Below are listed the best artifacts to be developed for a rally trap account:

Fruit of Eternity (ranged HP 30% and ranged defense 10%)

Wondrous Telescope (infantry HP 30%, ranged HP 30%, ranged defense 10%)

Prophetic Monolith (cavalry ATK 24%, ranged ATK 24%, and infantry HP 12%)

The Art of Building (ranged ATK 20%, ranged defense 16%, ranged HP 16%)

Meteor Watch (ranged HP 30%, cavalry HP 30%, cavalry defense 10%)

Eternal Walnuts (cavalry HP 30%, cavalry defense 10%)

Sparkling Hourglass (cavalry HP 30%, infantry HP 30%, infantry defense 10%)

Eternal Saffron (infantry HP 30%, infantry defense `10%)

Research Notes (cavalry ATK 20%, cavalry defense 16%, cavalry HP 16%)

Adamantine Hammer (infantry ATK 18%, cavalry ATK 18%)

Heirloom Wine (infantry ATK 24%, cavalry defense 16%, cavalry HP 16%)

Transmutation Notes (cavalry ATK 24%, infantry defense 16%, infantry HP 16%)

Growth Essence (cavalry ATK 24%, ranged defense 16%, ranged HP 16%)

Flower's Bounty (ranged ATK 18%, infantry ATK 18%)

King's Strategy (infantry ATK 24%, ranged ATK 24%, cavalry HP 12%)

PS: These artifacts listed above give you the total base bonus of infantry ATK (+ 84%), infantry Defense (+ 36%), infantry HP (+118%), archers ATK (+ 86%), archers Defense (+ 52%), archers HP (+92%), cavalry ATK (+110%), cavalry Defense (+52%), and cavalry HP (134%)