Boomsday Challenge Puzzle 1 not possible [Glow-Tron 2000]

In the first puzzle the own magnetics cant die, due to buffs (from 3/1 into 3/2, the Replicant Menace) - there is the same post from May, still not fixed! please help!

Not fixed because it doesn’t need it.
I just completed it.
The solution may have changed from the original one but there’s still one available

edit : the whole boss is perfectly doable