I do not know what you are considering. I would think +2 from himself for that particular faction as well as +2 from himself for the faction being a dwarf faction. I am not aware of any alternative interpretations and can neither imagine any that follow deductive reasoning.
By what basis? I see no ambiguity in:
Recap:MEDM wrote:Minion Cards (Clarification)
MEDM includes minion cards – a new type of card with a new type of template – the background is iron with a “rusted” purple tint. In MEDM, minions are used as hazards called ‘agents’.
MEDM says that minion cards are NOT hazard cards. Minions are used as hazard by Wizard players.
There wouldn't need to be an expection because minion agents are (and always have been)... minions!, which are (by MELE definition) character cards for Ringwraith players, and so implicitly also character cards (used as hazards) for Wizard players.
We can circle endlessly. Just because some rules were left out for brevity and some were left out because of reconsideration and acknowledged as such doesn't mean that some weren't left out because of reconsideration and not explicitly highlighted.
If there is deductive debate explicitly against the ruling, then it probably wasn't a good consideration for being left out for brevity! Rather, it is more probable to have been left out from reconsideration precisely due to the contradiction.