I used points for mirror …
UNEXPECTED COPY 1pt
UNCONTROLLED DUPLICATION 2pt
STABLE DUPLICANTS 5pt
Yes it is just Visual effect bug, so fire shield on mirror is same as our’s.
This is unrelated this visual bug.
If you think to make Fire DOT build using mirrors, I do not recommend it.
1 Base damage is low.
2 INT can scale up only spell damage, so DOT of Fire Shield do not have synergy (CIRCLE OF FLAMES etc.).
3 But, only INT can scale up mirror’s health. Non boosted mirror is too weak. often, they are killed before I cast Fire Shield for them.
4 Fire shield have 1 second Cool down time.
For example, we need at least 4 seconds if we want to cast fire shield 4 times.
So, we can not deal enough damage to enemy quickly.
In Other builds, they can deal enough damage to enemy if they have 4 seconds.