3(6) with tones and diphthongs

3(6) with tones and diphthongs is a vowel system was considered on the Vowel Ballot.

Proposal
The system was proposed saying: ''Proposed Tones: High level, mid-rising, and high-falling (ex as in Mandarin: má, mǎ, and mâ). Proposed Diphthongs: ao (aʊ, as in "loud"), ai (aɪ̯, as in "eye"), and oa (ʊa, sort of as in "water" but further back in the mouth). This is sort of a weird system, I know, but someone else said before that we're not going to depose Esperanto as an auxlang, so I'm interested to see what we can make of it as an artlang. I want a balance between simplicity and complication- hence lifting from Andrew Ead's proposed 3(6) system.''