Wizard101 The Abyss (solo on fire wizard) *updated in 2024* after KI change

KI decided to make a change to seemingly stop people from soloing The Abyss. Pierce no longer works to remove the -80 health shield (Shatter doesn't either for that matter). I had to find a different solution to remove the shield that I previously pierced off on round 10. My old strategy was an 11 round battle.
The answer was to extend the match by one round which allowed me to place 2 death dispels on and use a sprite on round 11 to remove the shield for that round and for round 12, the new hit round. With this strategy you need extremely high outgoing heal (I have 177) and you'll want to double up on any health buffs because the sprite in round 11 will use one of those up. You can no longer use Cycle of Life because it only lasts 4 rounds and won't be active on the new hit round.
Even with 177 outgoing and one buff on when I hit, I barely had enough to kill without critical. But it was good enough. If anyone sees a better strategy let me know in the comments.