[tied] Old English diphthongs

It seemes there's still no consensus on the phonetic value (and status)
of Old English <ea>, <e:a>, <eo>, <e:o> (and earlier <ie>, <i:e>). Would
it be safe to assume -- at least for autodidactic purposes -- the values
[æA] (offglide A being a-coloured schwa, IPA's "inverted a"), [æ:A],
[e&] (& -- schwa, e -- close-mid (rather than open-mid)), [e:&], [iy]
and [i:y], appropriately?

Sergei