Lich chose the Sleeping Bag for the speed stat not because it was a good choice but because it was a funny choice. He always wanted to be super fast while in a sleeping bag, there was no other reason for choosing it for this stat.
After picking up the sleeping bag dao static from a camping gear section of a store, he moved onto the last item he chose. Having the Chainsaw dao in the speed stat was because the faster it spun, the better it was in Lich's mind.
Though he would go through them faster, the thought of mowing down a horde of zombies with a chainsaw was all he had on his mind. Since he got all ten dao some experience, he went to the gate and found the person that Fin must of sent.
He found a nice quiet place to absorb them. The shirt and glove dao were painful as they tightened Lich and crushed a few bones while they also got extremely heavy. After that torture he moved onto the speed stat choices.