I am seeing quite a bit of advice regarding use of Holy Orders, or having a massive income to feed mercenaries. Unfortunately, that doesn't really help in the early game when the very first Jihad is called (1080 or so, like mine above). Similarly, Holy Orders don't seem to arrive til after the first Crusade, sometime after 1090. While the gamey boat abuse seems like the "best advice" for survival, it seems a bit limited when dealing with 3-4 doomstacks roaming around a confined area like the Italian peninsula, while standing in a defensive position at best means I can kill a few hundred, maybe a thousand more enemy troops before I get sent into a forced retreat (or wiped out completely).
Thinking on it some more, I went back in the save and looked at my other called allies - sure enough Hungary and France *were* gathering troops to send to my aid, unfortunately for me, they were trapped in the "gather more tiny stacks to add to the big one" loop, and would not have arrived for another 2-3 years at best. I think the only reason England made it down was the limit of troops that can fit on a group of boats helped speed up their response time.
Thinking on it some more, I went back in the save and looked at my other called allies - sure enough Hungary and France *were* gathering troops to send to my aid, unfortunately for me, they were trapped in the "gather more tiny stacks to add to the big one" loop, and would not have arrived for another 2-3 years at best. I think the only reason England made it down was the limit of troops that can fit on a group of boats helped speed up their response time.