Fire: Da Ji's weapon becomes Strength (M)/Rush (S); Strength is Assault/Defender
Mars' weapon becomes Assault (L)/Rampart (S); Rampart is Defender/Vigorous
Fire Beelzebub's weapon becomes Defender (L)/Twin Edge (S); Twin Edge is Assault/Rush
Ra's weapon becomes Strength (M)/Stinger (S)
Water: Sarasvati's weapon becomes Strength (M)/Stinger (S)
Neptune's weapon becomes Twin Guard (M)/Assault (S); Twin Guard is Defender/Rush
Wind: Seth's weapon becomes Defender (L)/Avalance (S); Avalance is Rush/Barrage
SSR Cybele's weapon becomes Assault (L)/Tri-Guard (S); Tri-Guard is Defender/Barrage
Thunder: Marduk's weapon becomes Strength (M)/Exceed (S)
Athena's weapon becomes Defender (L)/Strength (S) (...yes, that's Defender (L) and Defender (S) in the same weapon)
Mammon's weapon becomes Assault (L)/Rampart (S)
Light: Eros' weapon becomes Strength (M)/Elaborate (S)
Shamash's weapon becomes Strength (M)/Pride (S)
Aten's weapon becomes Defender (L)/Resilience (S); Resilience is Assault/Ascension
Dark: Nephthys' weapon becomes Strength (M)/Stinger (S)
Pluto's weapon becomes Defender (L)/Avalance (S)