Contrary to popular belief, Sacrifice is not good for Berserk activation while training. Its damage is inconsistent (and therefore its HP reduction). What Sacrifice ends up is aggravating the monster while doing variable damage.
Activating Berserk with Sacrifice with full HP: My Berserk HP is 4.9k (unwashed). My HP is currently full. I can Sacrifice a Skelosaurus a few times to get my HP down to Berserk level. However, in the process, the Skelosaurus has buffed itself (it buffs itself and surrounding monsters before attacking unless it has its own buff already) and has begun to beam at me. At this point I've done an inconsistent amount of damage to it that will allow me to 1~2hko it with Berserked Crusher.
Activating Berserk with Sacrfice with partial HP: Same scenario, but I now have 1/2 my full HP. A single Sacrifice brings me just under Berserk HP (yay), but it aggravates the Skelosaurus and it beams me. Now I still need to Crusher it 3 times, meaning I get beamed twice as opposed to the normal single beam. I would rather just run into the monster to lower my HP. What's worse is that Sacrifice is inconsistent, so it may bring down your HP too much, forcing you to pot.
Activating Berserk without Sacrifice: My Berserk HP is 4.9k (unwashed). My HP is currently full. I Crusher a Skelosaurus, it become aggravated, buffs itself, and begins to beam me. It beams me 2~3 times before it dies, bringing me down to or barely above Berserk HP (in which case I would simply touch another).
Though, I'm not saying Sacrifice is completely useless. It can be used to KB bosses, although Rush does the same thing at a greater consistency. It can be used as Berserk activation, although this, I've found to be only good for bosses that 1/1.
Sacrifice being an effective Berserk activator: I'm at a Left Pianus. It 1/1's me. I use a Ginseng Root to 40% HP, greater than my Berserk20 threshold. I sacrifice it once, and boom, I'm back in Berserk.
But that's my two cents.
who said you have to be attacking a monster while using sac?
i would think its primary use would be as an alternative to roaring and aggroing a full screen.
