my point is this
alfatoxin = 6 death quata
vs.
bonewall and boneyard = 8
alfatoxin + any shield that can block 1 damage is just about the best defence i have come across in this game. insert some sort of infectious critter or shield to seal the deal.
if you only use death for alfatoxin it frees up air to use eagle eye, i know it not the most popular choice, but it is pretty good for creature control.
also alfatoxin has great synergy with butterfly effect.
also if you are using alfatoxin to lockdown the opponets field, bonewall is of little value to you. so once again i will mention i do not use bonewall anymore.