lurker's comment: @ Peqeunino --Bucephalus makes a good point.
There is very little need for spears at this and potentially any stage of this game.
Would you agree the focus should be on expansion not military?
From what I can tell you have plenty of warriors running around and may even be at a cost to your economy at this point. Monty won't bother you till he runs out of space. Trust me on this.
I think goodsmell also made a very good point when he asked why BW? AI behavior tells us they will defend first so that's a tech they'll research (for you). Another tech research could've resulted in an eventual trade for BW and later IW.
By the time you're ready to go military you'd rather have horses and swords.
Initiate the action rather than
absorb the action.
The idea is to always put yourself at an advantage to your enemy. Horses cover more ground on offense and defense and can retreat from a skirmish. A spear will always defend to the death.
An example, Since I know you won't let Monty anywhere remotely close to a city and if he does you probably have a sword there not a spear.
If an enemy archer or warrior is 3 tiles away a horse can move up 1 tile and still be out of range. If the AI moves up another tile the horse can attack that unit. The spear will need to fortify and absorb the onslaught. Now add terrain to the equation and you have a winning proposition. Let the AI walk into your "funnel of death".