Merge           Barrier       Amplifier           Bonus                          
Requirements
Foie Merge  Red Barrier      Amp of Foie  30% bonus to Foie          LVL 6
Gifoie Merge  Red Barrier      Amp of Gifoie  30% bonus to Gifoie          LVL 12
Rafoie Merge  Red Barrier      Amp of Rafoie  30% bonus to Rafoie          LVL 18
Red Merge  Red Barrier      Amp of Red          20% bonus to Fire Techs  LVL 24
Zonde Merge  Yellow Barrier      Amp of Zonde  30% bonus to Zonde          LVL 8
Gizonde Merge  Yellow Barrier      Amp of Gizonde  30% bonus to Gizonde          LVL 15
Razonde Merge  Yellow Barrier      Amp of Razonde  30% bonus to Razonde          LVL 20
Yellow Merge  Yellow Barrier      Amp of Yellow  20% bonus to Lightning Techs  LVL 26
Barta Merge  Blue Barrier      Amp of Barta  30% bonus to Barta          LVL 7
Gibarta Merge  Blue Barrier      Amp of Gibarta  30% bonus to Gibarta          LVL 14
Rabarta Merge  Blue Barrier      Amp of Rabarta  30% bonus to Rabarta          LVL 19
Blue Merge  Blue Barrier      Amp of Blue  20% bonus to Ice Techs          LVL 25
Resta Merge  Recovery Barrier    Amp of Resta  Wider Resta Casting Range  LVL 11
Anti Merge  Recovery Barrier    Amp of Anti  Wider Anti Casting Range  LVL 13
Shifta Merge  Assist Barrier      Amp of Shifta  Wider Shifta Casting Range  LVL 16
Deband Merge  Assist Barrier      Amp of Deband  Wider Deband Casting Range  LVL 14

To create Merge, equip the barrier while having the required amplifier in your inventory.
Select the amplifier in your inventory. A use option will appear if all requirements are
met and the two items are ready to combine.