Miscasting
Here is where I think we need a lot more information.
# [*]It is rumoured that miscasts are entirely gone, but are replaced by a combined irresistible force/ miscast table effectively:

[*]When you roll a double 6 the spell is cast with irresistible force, but the Caster has to roll on the "lost control" chart, which is devastating, and far more worse than the current miscast table.


Lost Control Chart
# Roll of 1: Could be S10 hit for caster and models in base contact.

Roll of 4: The wizard is sucked into the warp and the large template is centred over him. S10 hits for models under a 5” template, centred on the wizard. Also, roll a D6. On a roll of 1-3 your wizard is plunged into the realm of chaos, ond a 4+ you lose D6 power dice instead.