no, there is no reason too. every class has a healing ability. spec into that!
its easier to heal using those than with the chalice anyway.
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OP: Paranub says it's easier to heal with melee than with Chalice. [url]http://thumb101.shutterstock.com/display_pic_with_logo/933619/147768557/stock-photo-portrait-of-a-laughing-man-with-his-hand-on-his-face-147768557.jpg[/url]
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so, having to juggle a chalice around players, listening to call out for help, and working out which player is calling out for help, is easier than melee attacking a thrall that is by instinct running at you to melee you.