What if Gerard de Ridefort perished at Cresson?

Famously, the Templar Grand Master was a notorious warmonger and militarily inept. He escaped as 1 of 3 from the slaughter of over 100 Hospitallers and Templars at the springs of Cresson in 1187. Before Hattin, he is purported to have been the last voice in the ear of the King of Jerusalem, Guy de Lusignan and convinced him to follow Saladin and certain defeat.
What if he had died at Cresson and a competent grand master took his place? Would the kingdom had survived if Guy had done what he was going to do before engaging de Ridefort? Which was stay near water and wait to counter Saladin who was days away from being forced to attack?

My first thread, all answers and insight are appreciated.
 
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