Do you even bother with these spells? It seems like the time it takes to caste these spells makes them almost useless except for maybe dragonskin and conjuration master spells.

Most of the expert spells are better, like Paralysis. You can use it on everyone while being forced to stand still, also it can be cancelled by attacks. Or you could just use the Expert spell which is much more effective.

The lightning master spell is pretty handy for dragon slaying. You can effectively shoot them down with ease, its like a "frikin lazor" to quote Dr Evil