1:The Sith Battlecruiser wasn't even completely disabled at that point, so it woudln't be tumbling.
2:I Rped the ion cannon hitting the Assault Sphere twice in two posts, so it hiti it twice, not once, and one hitting the Sith Battlecruiser
About you destroying 90% of the mines.
1:That is way overestimating. I Rped the majority of the mines being in that area, so there are about 30 000 - 40 000 mines. You can't destroy 90% of 30 000 - 40 000 mines in one post using only 100 TIE Devils. Plus, your Devils would naturally get in the way of some of the shots, a nd would instantly be disabled, because they have the worse hulls ever.
About you not being in the path of the ion cannon in my next post.
1:Since Planetary Defenses are now networks, if the first ion cannon can't hit you, a different one could.
Finally, edit your post.