>1. What kind of room you must be in to get super earth
>elementals?

If you check out my edge list I think you probably can work out that I decided to specialize for earth and picked edges accordingly.

But probably this is the bit you're asking about:
http://www.carrionfields.net/helpsearch.php?keywords=sympathetic+conjuring

> How much mana did you usually put in it?

If I wasn't set up to get back mana very quickly, a couple hundred; if I was and nothing was immediately pressuring me to hurry, then all of it.

>2. What is swing based on?

Mostly, your skill in swing. I believe it also works better for warriorish characters and less well for, say, conjurers.