Yes.
In fact, the build is not viable. I described its shortcomings in this thread [FeedBack] Deathspeaker pendant + Blood moon breeches.
The amulet has a garbage stat, and the pants have terrible defensive mechanics. Grandpa is useless in this build. In fact, there is a lot of damage and it is better to play through a sword + shield (3 damage reduction + minion HP). But I don’t have such a shield with a good roll, so I can’t say how it will behave in T100.
In fact, you will have enough damage to one-shot elite packs in T100 even without a weapon because Most of the damage comes from the unique property of the amulet, but the build has the same problem as all minion builds - survivability. This is a melee build - so the problem is squared.