Speedrun guideline of "Bohemond in the East"

This mission is very hard if played "correctly" as designed as the player needs to defend Antioch for an hour and faces a huge swarm of Turkish army sporadically. However, there's a speedrun way to make it super easy and finish up the entire mission within five minutes:

Take out all your knights in Antioch to the southwest of the map and upgrade them to cavaliers with plate armor and blast furnace (you may need to use markets to re-distribute resources), then proceed with the western margin of the map until reaching Kerboga's guards (don't bother Kerboga's towers),. Use one or two knights to lure away the mangonels and other guards, and let the rest of the cavaliers finish up Kerboga himself, then the scenario is won.

This is probably due to a glitch since the main objective of killing Kerboga only appears ~20 minutes during the scenario, where the first few waves of siege have already started. But still the victory is triggered once Kerboga is down whether or not the objective is displayed. I think the speedrun also grants you the achievement "Indiana Italy Jones and the Last First Crusade" if you manage to keep all the heroes safe.