Strategy advice - what to do with 3rd minion? (in General)

| am going to start another NCB and it will start off with 2 minions. UC tank and a wall. I'll use a RoE, HG, EB, AoF, HoC and MS/MgS on the UC tank and all heavy AC armor on the wall. I'll hire the 3rd minion eventually and train a EO and protection on it and let it wear a ToE. If it matters, the UC tank will hold either an axbow or SoD and the wall will hold a VB ;)

What EO should I train?

AMF, Mages are your bane. If you look at your team you are roughly anti-Tank anyway. UC, doesn't need ToA so you'll always hit them, you get Evasion, they'll miss you and you've got a wall which blocks mostly physical. EC would just be overkill, because you can beat Tanks easy enough. DM can be wasted a lot, then again you can say the same about AMF, but DM wont directly hurt the things that will hurt you most (mage).

UC hits small, but weak, so GA may be a huge issue, especially with the spread damage of SoD/ES (if you go that route). DM shouldn't be dropped entirely from consideration, as it would help against GA. It would also help against teams that use AS to boost HP so high that the damage of UC isn't too much of a bother. against another tank using VA, UCs damage would not be enough either. DM is more valuable than you may think.

AMF

Why's that PM?

AMF seems to be the preferred choice ;) One last opinion, should I even hire a fourth minion?