Im confussed could use clification

Console Discussion
1

Let say I’m wearing this

5% Chance To Cast Level 15 Blaze When Struck
5% Chance To Cast level 15 Fire Ball On Striking
+2 To Sorceress Skill Levels
+1 To Warmth
+30% Enhanced Defense
Fire Resist +30%
Damage Reduced By 7

I’m a lite sorc. If I use chain lightning. Do I have a chance for Fireball?

2 
https://diablo2.diablowiki.net/Item_Skill_Bonuses#Chance_to_Cast_on_Striking
3

So guess I need On Attack thanks

4

Spellcasts do not count as a “strike,” you’d have to go in and auto attack to do so.