I would recommend going Frozen mallet if you want a safe lane/team fight, frozen mallet gives alota lot of utility since all your attacks slows by 40%, and since you wont get any Attack speed items as riven you wont proc Trinitys slow very often which is bad. So iI would defientlydefinitely go for Frozen Mallet unless you totalytotally dominate and just stomp them in teamfights.