Zhou Tian can't say that he now has so much equipment that he could give it away, but he had already gathered nearly a thousand pieces of various equipment from cleaning up the battlegrounds of previous wars. Though it's not that every person has one, ordinary equipment simply can't catch his eye anymore.
Since he is not short of equipment, Zhou Tian naturally doesn't need to waste too much energy on the burrow spiders.
No matter how formidable Zhou Tian is, he is still just one person, and unless he knows some city-leveling, army-annihilating magic, he can't possibly wipe out the entire burrow spider clan no matter how easy it is for him to kill. Thus, according to the current situation, the key to Zhou Tian's victory still lies in whether he can kill the boss monsters in the enemy clan.
Once the boss of a monster group is gone, all its underlings will instantly fall into disarray, this is universally true no matter when it happens.