New Crit. Reduction on Randuin's
Randuin's and especially Frozen Heart will be nerfed next patch. However, Randuin's is getting 10% crit. reduction and I wonder how this stacks with the 10% AA reduction from Ninja Tabi and the 10% crit . reduction from the defensive tree. Do all of these interact with each other multiplicatively or additively. If it's multiplicative, it actually seems like the new passive is worth less on tanks who may have the other reductions already.