(If you dont have good % ranged weapons or a megatherium) Your best option is another arthro or a araneo with the web shot, the webs ARE A NUKE for arthros bcuz the damage will multiply for EACH HIT , dealing loada of damage, and for the tamed arthro, JUST SPIT, it's like the tamed vs wils giga battle, but tou have the IQ , the saddle and the tame bônus stats, but you will suffer , specially tour flak, the best way tô have a easy time again'st It, is to avoid caves