Rangers may cast Hunters Mark with out needing to Concentrate
You may choose to use the homebrew version of the monk class if you would like. Warning that it is changing as I playtest it and that it is a risk to use.
You can find the PDF file in the Scael Bundle page.
Previously, you needed a Str 13 and Cha 13 to multiclass in or out of Paladin
Homebrew rule is (Str 13 or Dex 13) and Cha 13