high IV is rare n good. N provided move set is good. But at such low CP... you gonna spend all your hard earn stardust on 1 single pokemon... which.. really dont quite make sense at all..
unless.. you're ok with it
for me..as long move set is ideal.. IV > 80%.. pokemon lvl 15 n above. I would rather power up that.
that few %.. really wont matter so much... but that huge amount of stardust u gonna to spend for lvl-ing up a low cp pokemon.. that would affect your game ALOT.
to each of their own tho...
Also...if you had master the dodging methodology fighting at gym.. You can win also.. so .. I would rather save those Stardust n use it for afew pokemon rather than just 1. Anytime Any day.