Maxdps sucks. Look at a site like Elitist Jerks is a far better source of information. Its more mathy, and complex. But far greater detail, and accuracy. You will literally get your information from the source not a watered down guide.
DMC:V is one of the best ele trinkets. Why? Your fire ele works off of a system called snapshot stats. Which is when summoned for the next (2 or 4 minutes) he's up he will no matter what your stats are work off of the stats you had when he was summoned.
Core of ripeness maybe a DPS gain for ele simply because it has more int then your witching hour. The moonwell chalice from firelands dailies would be superior to Core.
So if you summon him when DMC:V is up he gains about 1k extra dps, so constantly summoning with DMC:V proc'd is a 1k dps gain across the whole boss fight.
[Today 06:48 PM] Ion:swimming in a natural body of water ISN'T acceptable...it's momentarily tolerable