[English] Sticking to one pronunciation system?

[BoboTiG]

Taking this example: https://en.wiktionary.org/wiki/master
It contains 7 pronunciations! And we display them without any sort of distinction.

We can't add more data in the pronunciation area since it should really contain only pronunciations (and in this case, 7 is already way too much IMO).

Other dictionaries only pick one system anyway. Looking at https://en.wikipedia.org/wiki/Received_Pronunciation, what would be our best option?

Proposed solutions:

1. Status quo: the current situation is good enough.
2. Choose one system, and document it somewhere.

Has anyone more inputs, or ideas?

[BoboTiG]

https://en.wiktionary.org/wiki/year is even worse with 10 pronunciations.