Questions about Expeiration Timer, Ressurection and trigger assignment

ok here we go...
Ressurectoin - how can i set the units that he ressurects to a variable?
Expeiration timer - does this remove the unit from the game? or just kill em
trigger assignment - if i create a local trigger for every unit, how could i access that trigger later on

(wait i got the trigger one solved, but if you have a better idea i am willing to hear it, it was pretty much going to be a trigger array where the index would correspond to the unit custom unit value, example: The Trigger for the ghoul with the custom unit value of 5 would have the trigger unit[5], if you have a better idea then i am willing to hear it.)