At 80 in the full Savage set, geared appropriately (i.e. full crit because that's all we can really afford), your ice lances will do about 15k damage to a full savage opponent, also geared appropriately. They'll have about 115-120k health.
They fought back against stat inflation very aggressively, such that if you gear for, reforge for, and gem for full crit, you'll have roughly 22-24% crit in full Savage gear. That's still fairly low for Shatter, so that's really our only option. This means you'll have 3-5% haste, mostly from talents, and near-zero Mastery.
If you DF a target without IV or Time Warp up at 85, you'll have time to lance it 3 times for 45k damage, assuming they all crit. On average (meaning, factoring in your crit rate), they'll do about 38k damage.
If you pop IV or TW, you can get 4 lances in for a maximum of about 60k damage, averaging about 51k.
So no, you won't be killing people in a DF at 85, at most you'll do a little more than 1/3rd of their health without cooldowns popped, 2/5ths with cooldowns popped.
"you must spread out some more rep before +reppin affix again .."
not in any way defending mages strength, dont interpret it as that.
But I have to appreciate a well written / well thought out post in a thread full of such garbage