In regards to coin #1 again: the october issue of "
Coin World" has an article "Egyptian coinage under the Romans". In it there is a billon Tetradracm with a very similar looking helios reverse and a possibly similar left facing bust of Gallienus (his beard is trimmed though).
I still believe it looks like Commodus. Could be a few others with the scraggly beard though: Antoniius Pius, Marcus Aurelius, and Septimus Severus also come to mind.