There is one other option. We could move the Palace to a city with a bit of forest left. Palace grants 160 / 1.25 = 128 hammers overflow. With Bureau/OR switch (still neccessary, otherwise Bureau-bonus is divided out of Palace itself) we get to 320 hammers into Sankore so 230 / 2.5 = 92 base hammers required for Sankore, 2-3 forests, more likely 3.
Just market in some city without the Palace nonsense would be 150 / 1.25 = 120 hammers overflow for 240 hammers, that requires an additional 5 forest. This can be done Caesaria, Zepyhrion and Aintab with the latter being the least damaged by chopping its forests. This is probably the way.
On another note, I would feel better with another spear or two in Aintab.
Edit: The nice thing about 1t wonders is the reduced chance of getting sniped after teching silly stuff like Paper or DR. If you absolutely want Sankore then yes it's not important.
Just market in some city without the Palace nonsense would be 150 / 1.25 = 120 hammers overflow for 240 hammers, that requires an additional 5 forest. This can be done Caesaria, Zepyhrion and Aintab with the latter being the least damaged by chopping its forests. This is probably the way.
On another note, I would feel better with another spear or two in Aintab.
Edit: The nice thing about 1t wonders is the reduced chance of getting sniped after teching silly stuff like Paper or DR. If you absolutely want Sankore then yes it's not important.