Do your hot wallets auto-restart if they die, or must you do it manually?  i'm not certain LKY is online (Server Stats).

Here is a possible crontab script that you could edit for each wallet: (note the [ and ] are necessary)

#!/bin/sh
count=$(ps aux | grep [p]rimecoind | wc -l)
if [ $count -eq 0 ] ; then
   ~/coin/primecoin/primecoind -reindex -daemon
else
   echo primecoind already running.
fi