Chance at Centurion or Mark IV armor?

Since we don’t have the ability to choose different shoulder pieces, I’ve been itching to get my hands on either of these because they’re the only armors with different and unique shoulder pieces.

To summarize what I’ve got:
Helmet 155/191
Armor 155/191
Visor 50/55
Emblem 145/241
Stance 13/16
Assassination 19/20
Weapon Skins 29/38
DMR 6/21
SMG 15/21
Armor Mod 8/10
Power Weapon 65/76
Vehicle 50/61
Power Up 10/12
Anything I didn’t list means I’ve already completed.

I also want to hear from people who have either or both the armors. I want to know how much grinding or how long it took for you to get it.

I got Hermes yesterday. Just be hopeful and maybe one will come your way. I hope you get it as I love seeing mythics on the battlefield

I’ve been praying to Master Chief