cast hole on base of pump is reffered to as the "show-tell".
whe this weeps / drips it means there is a problem with it and most of the time means replacement time.
from what i know all water pumps have this .. my old lancer had it and it meant replacement time.
edit: just read the coil pack problem ... id say your spark is jumping before the electrode.
the missing and coughing suggests ignition system and the black smoke suggests unburnt fuel..?
id replace the boot/coil and water pump before further diagnosis. And if you plan too rebuild these will need doing anyway so its not dead moey regardless.
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