Which Ike?

Hey everybody, pulled a +spd -res Ike. I already had a +atk -hp ike that I like a lot and have been using a heavy blade vantage set on. Wondering which one to merge into?
I also pulled a -spd +def ike, wondering if I should fodder for heavy blade or aether, or just merge. The only other unit I really have that might want heavy blade is Effie or Minerva though.