I don't build clams with my 'excess' water gems. Mostly because I rarely have an 'excess' water gem supply. It's invariably being used. (Note: I don't have a philisophic reasoning for not using Sea King's Court, Murdering Winter, Ice Elementals, Wolven Winter, and if possible Water Queens)

You can not believe it all you want, but thats the way it is. I have and will continue to build clams if I have a need for them (with Atlantis for example) but rarely do I go for a clamhoard as I detailed in my TC guide.

I'm sure you can't find it concievable at all; but there it is. Clamhoarding is a red herring that is going to keep getting newbies killed over and over again by wasting their right now resources for turn 50 peace of mind. This isn't to say that there are not that many good upper end summons for Water Magic and that that could be changed. But with the sheer amounts of Jade Armor I tend to go through, having water gems is usually critical to 2/3's my games.