Immortals Fenyx Rising

To reach the final combo stage you need to hit a combo of 84 or higher.

To be able to reach 84 you need Ares’s Fury which is his 3rd and finally blessing to be unlocked.

Edit: Yes you can hit above 84 hits. I did this many times but before you unlock Ares Fury the game won’t count it. His blessing will allow your sword to change color when your in the middle of a combo.

A few tips to make this easier is to unlock.

Aphrodite’s Kiss. Being hit once doesn’t reset combo meter. (Her 2nd blessing)

Brood of Typhon Breastplate. Level 4 or higher to unlock the second ability which gives you 10% chance to gain an extra +12 to combo meter on hit.

I got this one and achievement in the Vault When in Olympos that is related with the incoming DLC. THe vault is located in Clashing Rocks

In the first group of enemies I used Athena's Dash and Ares' Wrath and got both achievements.

I hate to add yet another guide for this but I stressed about this and even saved most of the corrupted heroes to more easily do it. Don’t do that, this is trivially achieved end game. I assumed the existing guides probably had this in them but they don’t (they’re fine guides, just is just a checkmark guide to do this trivially as you’re mopping up).

Gear set up (this is a great end game gear set up anyway):

NOTE: you do need the third blessing from Ares for this to work.

Armor of Bright Divinity (extra +8 to Combo Meter on hit with Godly powers), obtained from Legendary or Bust quest line after defeating all four Wraiths (corrupted heroes) in their lairs.

Piercing Wisdom (Creates 5 stamina orbs per hit with Athena’s Dash… which hits multiple times, also boosts damage of Athena’s Dash) this is the Nike set helm, one location is extra chest in Dolos’ Stage of Trickery Vault in Grove of Kleos.

Any Bow (doesn’t matter), I use Resistance Bow for my build but it doesn’t help with this.

Any Axe, also doesn’t matter, I use different axes end game but I usually come back to Fabled Guardian’s Axe

Any Sword, doesn’t matter, but Crystal Shadow is my favorite end game sword (as I prefer dodges to parries).

Now you just need any group of enemies, fast traveling to Ajax’s Fort in War’s Den will put you in front of a big group. Sneak into the center and just start using uncharged Athena’s Dash, you’ll be spewing stamina orbs all over the place, if you don’t automatically suck some up run and grab some during a free second. You can use charged Athena’s Dash on Cerberus once the little guys are dead. Your combo meter should be well into the 200s by the end of this fight if not over 300.

End game I get over 100 pretty consistently against even groups of three enemies with this build, so you can just go play if you want. Use Athena’s Dash to kill, you don’t really need much else, you can pull Harpies down and use it on them if you want (or jump up to them and use it), it even works fine on Gryphons. I charge it for high health enemies (like Cyclops and Cerebrus).

Here is a good Spot to get the achievement out of the Way, without to many issues. Note: Be sure to kill first the other enemies around him.

https://m.youtube.com/watch?v=UXpZiujOOTM