hmm...
depending on which summons you use...
be them old summons, or new...
you can stick their summon skills in to a hot bar.
so be consistent.
i have aoe nuke from summons, aoe hate, leap attack... all on bar 3.
bar one is mostly reserved for heals and individual marks.
bar 2 is for primary pet attack, primary marks, and exile...
i should stick rage there, but i only get in a few rages before i start re marking.
but i am by no means a pro summoner... it's a box account with a few macro sets.