So, I've noticed changes in flag HP a few days ago.
Sardons flag HP:100
Swamp flag HP:150
Deadwood:100
York:100
Snow:100
Castle:150
I think all the flag HP is ok except for Sardon, Sardon is already hard enough to take. HH lag block and there are spikes. Maybe just make the flag HP again back to 75 and make the door (at the spike place) bigger so that people can't lag block.