Hypersmurf
Moderatarrrrh...
Only the strongest damage from an overlapping zone applies. So that isn't a big deal. Its just broken when you start yo-yo'ing enemies in and out of it without spell accuracy.
Consider a Wall of Fire and a Blade Barrier in an interlocking "C" shape:
Code:
[color=red]WW
W[/color][color=blue]BB[/color]
[color=red]WW[/color][color=blue]B
BB[/color]
By Pushing someone 4 squares in a straight line, with no zig-zags, you get him to enter the Wall of Fire's space twice, and enter the Blade Barrier's space twice. Overlapping, no big deal; alternating, it gets nastier.
Given that Push doesn't forbid zig-zags, of course, you can get even nastier by having two parallel barriers:
Code:
[color=red]W[/color][color=blue]B[/color]
[color=red]W[/color][color=blue]B[/color]
[color=red]W[/color][color=blue]B[/color]
[color=red]W[/color][color=blue]B[/color]
[color=red]W[/color][color=blue]B[/color]
Now with a Push 5, you can hit five entries by zig-zagging. With a Slide 8, of course, the yo-yo goes from "damage per 2 squares" to "damage per square".
Forced movement ignores occupied squares. So long as the end point is unoccupied there is no problem with shoving someone through an enemy or friendly.
Clear Path: Forced movement can't move a target into a space it couldn't enter by walking. The target can't be forced into an obstacle or made to squeeze into a space.
He can enter an ally's space by walking. He can't enter an enemy's space by walking. Therefore forced movement can't move him into an enemy's space, though it can move him through an ally's space.
Theoretically you can even use push/pull/slide powers to move friendlies across pits so long as the start and end point are on solid ground(as the power resolves instantly and nothing prevents you from pushing over a pit, only through barriers)
If he enters a space above a pit, he gets a saving throw to catch himself before he falls. If he doesn't save, he falls.
-Hyp.