I assume you're using this comp: 

https://deadwoodjedi.com/speed-tunes/ultimate-budget-unkillable/

Where is it going wrong? What is happening? What affinity did it fail on? Did you double check true speeds?

I bet it is a masterie. 

Some lore if steel or some other that messes turn meter! 

It starts off stunning royal guard then goes to fayne

What affinity was this on? Was this NM? 

Yep, NM, still void.

BTW, this is my functional CB team but I'm trying to move to unkillable.

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You guys are right, I have lore of steel on Fayne, but I guess I incorrectly assumed that would be rolled up into the stats (where that 2 from the masteries is coming from... she's in all perception)

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I have it on Geo as well, but he's in fatal and fury.  That should be fine, right?

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From his speed, that should work. But Giantslayer is the wrong mastery. His passive counterattack can't proc masteries at all. Instead there is an effect similar to Giantslayer in this passive allready built in. They changed this to the actual status some month ago, there was a bug or something in the interaction of his passive and the masteries, so no masteries for his passive is the Plariumstyle bugfix.

His A1 and A2 are both single target attacks, so you should take Warmaster as tier 6 mastery, not Giantslayer.

Anyone have a guess why royal guard is getting targeted for the single target stun?

Your slow boi should not have life drinker, and I could see that causing targeting issues. So that's the first thing I'd change, can change to Warmaster as well then :)

I would also run through the calculator after putting in gear sets + Lore of Steel where relevant and double check that everything lines up properly. 

Tested your stats with the stun calc (although for the lower speed tune) and it gives me Fayne as the first 3 rounds of stun target. After raising her hp to 32.500 or more it was ok. As well you have over 50k hp on Geo which could cause problems as the guide said not to do this as it messes up things (no idea if that is still up to date). PK also has way to much hp and not that much of a buffer in comparison to Geo´s hp. Using dd´s at around 33-35k hp was fine for me and i still had some dmg-stats that i could build into. Oh ... in case you ain´t doing it: Geo needs to be in the lead. It never worked for me without putting him as leader.

HP/DEF ratios could also be 100% an issue here. I ran: https://www.deadwoodjedi.com/speed-tunes-4/New-Budget-Maneater---3-Bosses-only-1-Comp for ages and went with the following HP/DEF ratios

ME/DPS 10 or less

PK around 18

I think this still could be a life drinker issue, but there's a few wrinkles to iron out as we absolutely should be following stun targeting rules in whatever comp we're running. 

Hey, great tips guys.  Won't be easy for me to switch this up but I really appreciate the different things to try.  Might just need to use a different squad with these additional considerations as I use RG and Geo in my iron twins team (which stinks btw) and Geo in my tag arena (it's all dwarves).  Thanks, you guys are great!

Fair enough. :)

When you take another crack at it, feel free to drop back in and let us know how it's going. 

Yoooo I just pulled Maulie in the summon rush on my first of two sacreds, so I can take Geo off my tag arena team.  Woohoo!  Been a successful fusion event for me already!