If they're not elite's to begin with,you can't 'make' them elites,you can BOOST them,but you can't turn non-elites into elites.
When you boost them,their ability and their grow rate for ability get a 20% Boost,but your Torpedoman with 12+ Torp Base doesn't become a Torpedoman with 15+ Torp Base,your just getting a 20% Boost.
And if you do have the money to boost them all,by all means,go for it.
I Tried to explain it,hopefully this helps.
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