This depends on your play style more than anything. There are so many variables there is no one splinter or elite set cards within it that can be called the best.
However, using cards you're familiar with, and know how to pair with one or two others to exploit a given ruleset is about as good as you can get in regard to optimal odds.
I may be wrong, but I think building a solid little league team, using as many neutrals, to fill as many specialized positions as you can, puts you in a position to always have access to a small team of personal elites you can scatter anywhere.
Yes, I need to start looking at formations and positions in a better way and stop looking only at the bonuses that the summoner gives me.
Thank you for the tip. I'm a newbie and I'm really grateful! ^^
Summoner bonuses matter, but most only have a limited effect.
Having versatile cards to augment the cards not buffed by summoners transfers well to any summoner.