First of all, we should make sure that the gate is repaired and all the holes in the wall are fixed.
Are those ten points after we fixed that or before?
I am very much in favour of the rolling logs. And I'd rather go for spiked pits. Fire traps can be turned against us.
And what about the boiling water? We could use the traps to "channel" the orcs and then drop the water on their heads ...
Edit: Hm, we could also leave one obviously weak spot in our defences to lure the orcs there. It should not be too obvious, of course.