Planar Bind a Nightmare, be Ethereal and skip the AMF dungeon level.
AMF as an abjuration extends onto the etheral plane... I think.
Apart from that, the starting level seems to be 8, so that bars 5th level spells and higher at the beginning, if I read Endarire's description correctly.
General comments:
- I do not think the secret page trick works since it only enables you to make the text "show" another spell. But this does not give you that spell to prepare spells from (since the secret spell description does not make mention of this).
- a mage armour item crafted for 900gp only works 1/day for 1 hour, not at will.
- where is the guardian naga coming from? (including its 9th level spellcasting ability?)
- How will the wizard(s) survive surprise attacks by, say, shadows or umber hulks? (an idea vs the shadows would be to keep away from walls and get a reach ghost touch or disruption weapon as well as the combat reflexes feat, maybe with the spell storing enhancement and chill touch. About the burrowing Umber Hulks I have no idea yet...)
- somehow I think that taking leadership with a full pc wbl and getting higher wbl via item creations defeats the puprose of trying a solo challenge, but it definitely still sounds like a challenge!
- Giacomo