i ll say this, FFXV at this time, is the best FF game that has handled summons as they supposed to be, incredible beings of immense power that come to ur aid and deliver, no other FF comes any close to what XV did imo.
Is not like Gigaflare from the space that do 5k damage and dont kill ( i never liked that )
Lets see how FFXVI ll handle summon in normal combat, it ll have some kind of over the top invocation or just the "lend me your strength" in combat.
The Summons in FXV were definitely visually spectacular.
But mechanically I never liked the implementation, from what I remember they basically trigger at random usually when you are low on health. And ultimately they are still just a cool animation.
Also they were really clunky to fight against, both the Titan and Leviathan fights in XV are some of the worst in the game.
Personally I liked their implementation in 7Remake.
It's not as visually striking but I like that the Summons stay around and fight for a while, you can also have them use various abilities and when their time runs out the exit with a cool attack and animation
.
XV so far also seems cool in that you get to physically control at least Ifrit, and the battles against them look awesome.
I do however wonder if there's some sort to use summons in regular battles too, maybe some sort of overdrive attack.