Well, Layla is a great character that replaces Zhongli and makes a great shield. That's a real advantage her vision is cryo because she can play a good role as a defencer in Escoffier's teams.

The new 4 star weapon Dockhand's Assistant could be the 2nd best weapon for her right now because of the HP% stat

For Monocryo... Shenhe Layla Kazuha Ayaka very strong, but lacks heals

Weapon: Cinnabar Spindle (Event weapon) 69% Def and 80% of defence added to skill damage
every 1.5 sec
4pc Tenacity to buff the team if no one else has it, otherwise 2pc husk and 2 pc Cryo/tenacity/18% att set

Main Stats: Def% Cryo%
Substats: Att% Def% Crit CritD Hp%

Morgana has now been officially de-throned, now its Morgala. Layla bringing beast sheilds and better cryo reations, Cryo Xingqui/Bennett, easy broken 4* worthy of being 5*

She is better than Diona and you can use some attack but you should try for more hp

can she use the atk stat or do you need to build her on pure hp?

Does she perform better or worse than Diona in terms of Shield Strength? Or Diona all the way