There are so many problems here that it's hard to know where to start:

• No, Cardiel should absolutely *not* be in Relentless for CB
• Your CB team is lacking .. like, every single important quality for a CB team. I'd advise you read up on how team compositions for CB work, because there are a lot of problems with your team
• Even putting aside the above problems - I'm expecting it's nowhere near properly tuned

So uh ... to answer your specific question? Yes, you should remove Relentless and use ... like, literally anything else.

Would love to see your champs and see what else we can put around Cardiel. 

Thanks ok, idk yet what I'll use but soon I'm going to take someone out to swap in sandlash survivor to get that block damage going just need her booked fully b4 I add 

Now my other account I have just got pythion and I'm just very lost what others to use with him, im thinking sentinel she's a cb champ..I got maranix for dd champ in there and kael again, orn which is throwing great poisoning...I need a better poisoner then kael I've got fee frozen banshees would that be better?

Cardiel is a boss. Relentless on him wont be "bad", but problem is, if you run him in CB with that, he'll outrun Ally Protection or Unkillable or Block Damage buffs.

I geared mine in 4 immortals and 2 speeds, but there's many different ways you can build him. If you play him mostly in arena, a focus on resistance is a good idea.

Yes my cardiel account is definitely not speed tuned I don't have the gear yet on doing so but when I do will need some advice where to 

I play with cardiel everywhere!

So quick question, if I put him in other gear still will need him fast so if he is fast won't he still outrun the protection or block damage again?

Still some really fundamental misunderstandings of how speed tunes in general work:/

i would keep a good relentless gear (it is what mine have and its my fav champion, was one of my favourite leggos and it is still the one i could not set aside) i use it everywhere (, arena gold V, all dungeons complete, faction complete, still use him in iron twins and sand devil (not complete yet but going), also great for hydra (really, really great to keep everyone else going) 

For clanboss i think its better you deal whith what you have, even in relentless sooner or later you will manage a unkilable comp and no need for cardiel there regardless.

NOTE: i used cardiel in clanboss before (with scyl, kymar, fayne...) and even in relentless (i know its supid but it was what i had)  ive managed to get the brutal chest daily with 2 keys. 

Yes I'm comfortably now 2 keying brutal with my team I've switched out ronda into toxic gear and gained her awakening that boosted my damage but one day I'd like to have a unkillable team... for now I'm gonna keep cardiel in relentless because he is great in all other areas in it and I have a great 6 star set and got lucky enough other day to switch his boots to speed now I got 196 speed on him with relentless 

Weird thing I've noticed is if I run my team on cb on phone I get more, then if I run on my PC idk why this is, have anyone else noticed this b4?

Are you saying it takes longer on your phone, because PC definitely runs faster. If you're talking damage etc. there's no difference. 

Also, it would still be nice to see what champs you have to work with your Cardiel in screenshot form :)

As a general rule with Relentless gear, you're going to want it for a champ who's maximizing with passives pretty often. Cardiel doesn't benefit that much from taking more turns even if his A1 will give you more healing.

I'd love to see how that Ronda is built too, because I think you'll get more out of her building her for raw damage rather than throwing Toxic on.