to be specific for those months-old posts-
grizzly rolls 550-750 base life, 650 on average, then has its base life increased by the % from your dire wolf pseudo-synergy, and then that's further multiplied by the normal % max hp scaling of battle orders added to oak sage
so for example with level 30 dire wolf and level 16 battle orders, your grizzly will have ~10.2k life on average. And any level 18+ grizzly has its resists maxed out at 85% fire/cold/light/poison, 0% PLR, 0% DR
which means it generally dies in 1 hit to elemental attacks with significant -% resists, but can also tank a reasonable amount of non-piercing elemental damage. Blizzard will instantly kill it, but 6k avg damage traps take about 12 hits (not that it matters, you have to resummon each mind blast)
Also the odds of rolling % amp damage on a shadow master / valk are very low and the odds of it actually hitting someone and rolling that 5% is low and the odds of seizing on that very brief window before the amp expires is low
Its like a 1/106 chance to spawn with amp, and 1/20 chance on striking, and 9/10 chance both you and your opponent stop briefly to wonder wtf happened and accuse bm / get irrationally mad at some nearby necro