Save up for 300 each time when the rebate happens. Draw in the gnw treasure until you get Madara founder of konoha. Draw in the temporary treasure of edo roshi.

After that, honestly the only other seal ninjas worth going for is hashirama for the skill trial. Tendo would be nice as you can sweep ti easily.

Treasure ninjas as a whole are pretty garbage nowadays with the most useful ones being in the gnw treasure with the swordsmen for lightning main.