Fire Shield and Thorn Carapace compared.
Turn | FS | TC average |
1 | 1 | 0 |
2 | 2 | 0.75 |
3 | 3 | 2.25 |
4 | 4 | 4.5 |
5 | 5 | 7.5 |
6 | 6 | 11.25 |
7 | 7 | 15.75 |
8 | 8 | 21 |
Edit: Mistakenly calculated for 50%, fixed to 75% now.
Assuming a -25% on the TC averages, which is the "horrible luck factor", even with horrible luck, in 5 turns TC should be a better choice.