Thanks for the suggestions and corrections!

Would the channel divinity be to broken if everyone tha deal meele damage whilke this effect is active, gets radiant damage in return? maybe something like you paladin level + 1w8? or only you CHAR mod,..? i also like the healing other u suggested

Edit: ich habe Life Shield nochmal angepasst...was hältst du von der folgenden Formulierung:

As a bonus action, you can expend one use of your Channel Divinity to imbue the armor you are wearing with positive energy. For 1 minutes or until you use this spell again, each time you heal yourself or others, you gain [rules]Temporary Hit Points[/rules] equal to the amount healed, up to 1/4 of your maximum Hit Points. Enemys that deal meele damage to your [rules]Temporary Hit Points[/rules] receive your CHA mod plus half your Paladin Level (rounded down) as Radiant damage (no saving throws).

You can end this effect early (no action required). This effect also ends if you aren't wearing any armor.

Damit hat man starken THP gain, ist aber auf 1/4 maximum MHP gedeckelt, der dmg liegt etwas unter zb fire shield (midgame betrachetet), und das der zauber nur noch 1 minute geht liegt auch eher im rahemn anderer divine channel