Same Tank / Defense kit — farm Zephyr now, or invest Forma into Zephyr Prime when relics and slots allow.
Pick Zephyr if…
Pick Zephyr Prime if…
Zephyr Prime is the same kit as Zephyr with better long-term polarities / stats. Farm Zephyr when you need the fantasy now; move Forma to Zephyr Prime once relics and slots allow.
Zephyr
Zephyr Prime
Zephyr
Match the priority to your main ability — Strength or Duration first for most kits, then Efficiency, then Range.
Zephyr Prime
Match the priority to your main ability — Strength or Duration first for most kits, then Efficiency, then Range.

