The Summoner is a caster class first and foremost and not a pet class because the pet has very limited uses. When only one of the three current egi's is useful then sadly it just breaks the true nature of the summoner completely. The fault is classifying the egi's into the special archtypes like caster, dd, and tank. The only way to fix the summoner and make all the egi's useful is to drop the archtypes on them and make them each unique so that they can be used for a variety of special moments.

It's just sad that Garuda Egi is the only one that ever used and the other two have become completely worthless once max level. This is the best way to adjust the summoner with the current lore in the game because it doesn't break it in anyway at all and It just makes all the egi's useful. I hope they decide in the future to do this kind of adjustment in the game to the job.