I've been needing to add in the 4th Pokemon Communication, but I don't find that the 4th Pokemon Collector is necessary. After all, there are only ten basics in the deck, and most of them don't need to be searched out since I'm not always going to use four Cleffa or three Tepigs.
One last thing, why would you take out the Seekers? I find them quite vital for a Shaymin pickup to pull out a surprise Zekrom/ RDL in one turn.