Chance to Cast when struck

I have some questions about items with "chance to cast when struck". Let's say you have both "10% chance to cast lvl 3 Nova when struck" and "12% chance to cast lvl 4 Nova when struck" among your items. Can they both trigger at the same time? And these skills don't make you do a cast animation right? so could you cast your own Nova on top of the 2 that trigger?

Another question. The Hit Power Crafted Items all have "5% Chance To Cast Level 4 Frost Nova When Struck". can crafted amulets also contain the "of frost shield" suffix giving "5% Chance To Cast lvl 3 Frost Nova When Struck" so that one amulet contains 2 different lvl Frost Novas?|||If the level of the CtC spell is the same, the chances add together. So if you had 5% CtC L4 Nova, and a a 10% CtC L4 Nova, then each time you were struck you'd have a 15% chance to trigger it.

If the level of the CtC spell is different, you get two rolls. So yes, you could have both your L3 and your L4 nova trigger from the same hit.

Crafted amulets can contain all the mods that rare amulets can. If the mods already come pre-packed on a crafted amulet, then yes you can double up on that mod.

No animation on CtC spells. But all the CtC spells are so horribly low level that they're essentially worthless. You'll never get enough damage out of them to make them useful past A1 Normal.|||I was thinking of making a sorceress with all Hit Power items giving at least 50% chance to cast the lvl 4 Frost Nova. I know the damage won't be that great but it does benefit from synergies and Cold Mastery right? On top of that I want to cast my own Frost Novas which are much higher. Maybe not good enough in hell, but it will be fun in normal and nightmare i think|||fully synergized L4 Frost Nova does 40-57 damage. CM can, at best, double that to 80-114, which really isnt enough damage to do much even in NM. Even a L20 FN only does about 200-300 damage, which means your L20 Frozen Orb (a FN synergy) would be a far superior attack. And you have to actually get hit to get that to trigger, which sorcs usually want to avoid :)|||Sorry to bump this old thread but - "But all the CtC spells are so horribly low level that they're essentially worthless" is simply not true.

CtC FROST NOVA on a act 2/5 merc IS THE BEST THING SINCE SLICED BREAD :). Getting the perfect gem early requires visiting some gem shrines... The mod can also spawn on magical amours so always identify and check for it...

Put the crafted Hit Power helm & amour on a act 2 mercenary - and you get "a holy freeze" merc from normal + an extra aura(prayer). The damage is crap the SLOWING EFFECT is golden...

An example of application - in chaos sanctuary - send the merc in, chill the screen - proceed to 1 hit chilled monsters with a big *** ethereal giant axe [vengeance + conviction]...