Warlock: possible to trade a higher invocation for a lower?

[ragnarok1983]

On level up (Some levels) you are allowed to trade invocations. In this game it does not let you trade a higher one for a lower one of course.

I am curious if:
1. If it is even mechanically possible.
[Edit]
1b. Is it mechanically possible if i beg and plead and say "pretty please" to a dm? *dons the requisite knee pads*

2. Is there any PnP precedent. (I don't have the paper resources I once had).

3. If yes to #1 and #2, would BG staff allow it?

I am not going to lie, there are some higher invocations that I am just like "meh." But some of the least invocations I am like "of course I want to see invisible people all the time!"

[NegInfinity]

1. If it is even mechanically possible.

Nope.

2. Is there any PnP precedent. (I don't have the paper resources I once had).

Yep.

In PnP you can trade higher invocations for lower ones, but it is one time thing. So if you traded Dark for Least, you can't swap it back from least to Dark, it'll remain Least forever. You'll be able to trade it for another Least, though.

would BG staff allow it?

There was an attempt to implement spell replacement system, but I'd rather never see this thing go live. It is a HUGE step back compared to what you can do with original warlock/wizard invocations.

Basically it is one of the areas that could use a new engine or access to original source code.

But some of the least invocations I am like "of course I want to see invisible people all the time!"

You will never have enough invocations either way. Specialize in few tricks you like specifically.