Not really like life tap, its like a self-buff that only works when u die. it doesnt require any hp usage. more details can be found at
http://fiesta.gamengame.com/guide/li...=2&skillType=1 . I also remember someone once posted a guide which shows all the above lv 60 abilities from uruga skill master and their effects, its probably in the guide or general section.
The "cleric mock" skill is called "recover"...
edit: here's that thread:
http://www.fiestafan.com/forums/showthread.php?t=1551