actually, I'd really really really want more pet interaction with it. Being a Summoner ability, i'd make much more sense if Tri-Disaster would actually change according to your current summoned egi.

Default Tri-Disaster: Deals 30potency like it does now with the bind effect. That way you'll have the means to resummon in tight situations where your pet's gone.

Garuda - caster type - looking at her Enkindle, she deals a lot more burst damage than the others, maybe even include a aoe-pushback considering her strong wind effects
Deals 60 potency of WIND aoe damage and pushes targets away.

Titan - tank type - his synergy would probably affect some kind of status debuff.
Deals 20 potency of Earth aoe Damage and reduces enemies Damage dealt by 5% for 5seconds

Ifrit - melee type - he could add some nice dot type effect like his Enkindle or even empower them
Deals 30 potency of Fire aoe Damage and doubles the potency of your next 2 DoT ticks.


But it looks like the designers of the Summoner just likes to keep this attack uninteresting (or the whole class itself)