All single shards were consolidated into a single spell at level 18. If you had a master in any tier of the single shard, then it made it a master. It will scale to your level (level of caster) not the person recieving. As you level up, it will get better. So instead of having a billion shard spells and having to figure out what is what....we only have the one single shard one. The raid shard has not changed. That is the same as before updates.
Nice thing is that higher levels can overwrite them, and that even if you recast it will make them 3 charges again. So no more telling people to destroy shards to get a fresh one.
EDIT:
There does seem to be an issue tho about single shards not overwriting the raid ones or something not sure.
Please see post here:
http://www.eq2flames.com/conjurors/4...os-broken.html