As a general rule of thumb, i think its believed that targetted debuffs dont stack with eachother. Whereas placeables do.
All i know is that only my placeable TA powers stack with themselves, while my targeted AoE's dont.
Sorry i cant be of more assistance.
(im guessing you'd be close to the slow cap as it is anyway).
Let us know how it works out if you test it.
Good luck
Placables always stack due to the fact that they are technically applied from different entities. For clicky debuffs, some stack from same caster, some don't, depends on power.
Best way to find out if a power stacks or not would be checking NoFuture database. As for shiver, it would appear that the runspeed cap reduction doesn't stack, while the rest of the effects do.
Ok, ok I keep forgetting to test this and there have been several changes back and forth about this power.
omgz shiver spam for teh winzz etc. etc.
Basically... does it stack at the moment? I know it used to and then they gimped the recharge a little to prevent it happening easily but I slotted it 2acc 2rech and with hasten I fire it off regularly in longer fights. So is the -recharge stacking still?
I'm sure I could sit there with a stopwatch and a +0 minion and do this myself but if anyone knows off the top of their head I would be grateful. I'll try testing it tomorrow night if nobody knows and post back here.
BTW I'm a -recharge freak and have arctic air and snowstorm as well! -Recharge for the winz!!!!!