Asetoni FFXV | FFXV: Ignis guide @asetoniffxv22 | Uploaded February 2018 | Updated October 2024, 3 hours ago.
An in-depth look at how Ignis’s combat system works in FFXV.

List of acronyms used for his attacks:
FO: Fire Opener
F: Single basic Fire attack
F-: 2+ consecutive Fire attacks
FE: Fire combo Ender
D: Directional attack (fire)
I: Ice attack
IE: Ice combo Ender
T: Thunder attack
TE: Thunder combo Ender
C: Counterstrike

All of the attacks listed above increase both ice and thunder counters by +1, with 4 exceptions:
1. F- only gives +1 despite consisting of multiple attacks
2. D doesn’t increase either counter at all, unless both counters are 0
3. IE brings the ice counter back to 0, but still gives +1 to thunder
4. TE brings both counters to their maximum value, which is 4 for ice and 8 for thunder

Both counters reset to 0 if you stop attacking. This includes things like getting hit or dodging. You have to dodge with “D” if you want to evade damage while keeping the combo going.

If ice counter is 0-3, Ignis will do a “I”, if it’s 4, Ignis will do “IE”. However, “IE” can only happen after “I”, “F” or “F-“, which means if you just did any other attack, it’s possible to do “I” when the counter is 4.

If thunder counter is 0, Ignis will do the version of “T” that leaves him next to the enemy. If it’s 1-5, he’ll do the version of “T” where he dashes through the enemy. If the counter is 6 or 7, he’ll do “TE”. If the counter ever reaches 8, thunder attacks become entirely unavailable, until you reset the combo by stopping attacking.

If some of this is unclear, feel free to ask in the comments below :)