5e Alternate class features: Class Fusion Features

[BerzerkerUnit]

Had an idea inspired by an idea for a warlock patron.

Idea is boiling down to this:

At levels 5-7 you can choose an alternate feature that allows your current class to synergize more seamlessly with another.

Example:
Warlock 6- Raging Patron
Your Barbarian levels are added to your warlock level to meet prerequisites for Invocations

Scholarly Patron-
You decide whether Warlock levels count towards your Pact magic caster level or another Spellcasting feature you have to determine # and level of spell slots.

Fighter 7- Dervish
The Extra Attack feature of other classes are added to your fighter Extra attack feature to determine your total number of attacks.

Monk 6- Disciplined
All class levels add to your monk level to determine unarmed damage and movement speed.

More to come, IÂ’d love some more ideas.

[Zaile]

So 3e had the "Ascetic" feats that allowed monk levels to stack with other class levels to advance one or two features. See here: https://www.dndtools.net/feats/complete-adventurer--54/ascetic-rogue--129/

The way 5e is, this would at minimum be a feat, but determining the balance level would be really hard as not all features are equal. I could see a house rule allowing swapping of 3rd/6th/7th, etc. level abilities with same-level abilities from similar sub-classes. Like Celestial warlock's Radiant Soul with Divine soul sorcerer's empowered healing. This however, takes a lot of work.