Nakhthorheb + Revolutionary Council

The player has 2 minions: Anarch Convert and Nakhthorheb.

Assuming Nakhthorheb is Anarch and a Baron, can he call a Revolutionary Council, untap himself (using his minion special text), choose 2 ready untapped vampires (himself and Anarch Convert) to make a Methuselah burn 4 pool?

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Nakhthorheb, 10, OBF PRE SER, Followers of Set, 4, [LotN:PS2]
Independent: Nakhthorhebmay untap once during each of your minion phases. Minions with yourcorruption counters cannot block him. +1 strength.

Revolutionary Council, Political Action, baron, C , [TR]
Requires a baron. Choose X, then choose X ready untapped anarchs you control and allocate 2X points among one or more Methuselahs, locations, and equipment. Successful referendum means each chosen anarch is tapped, each Methuselah burns 1 pool for each point assigned, and each location or equipment assigned a point is burned.

Yes. Nakhthorheb's untap ability can be used at any time during his controller's minion phase.

Yes he can since he can untap at any point during your minion phase.