Wow, fielding two Slann? I guess with double focused rumination you'd have a chance throwing out plenty of spells.. and as mentioned above lore of Death can generate power dice so that might be a good choice.
I have to say, I'm not a big fan of purple sun. Don't get me wrong, the spell is utterly devastating against anything with 3 or less initiative... but that, in itself, is the issue. Empower it, throw in a power scroll, and now it is using the large template and only a 13+ casting difficulty for wiping out most of your opponents forces on even a nominal artillery die roll. Even worse, you roll misfire and watch your slann and nearby units get ripped to shreds.
Purple sun, is nothing more than flipping a coin to win a game against low initiative armies. In my humble opinion, when you have a large template that can move 30 inches straight across your enemy's deployment line and blow up 50%+ of their army it is the least sporting thing to do.
Actually, myself and an Ogre Kingdoms player have an agreement between one another.. I don't drop purple suns on him and he doesn't slaughter master greedy fist against me. We play the game to have fun and enjoy a few hours of gaming. Nothing reaks more than taking time to construct an army list, get it ready for deployment, agree on terrain, roll for table edge, take turns setting up, then getting wiped first turn to the point you know there is no coming back.
