主人の耐久力の変化によるhp変化は、使い魔のhpに影響ないそうです。 http://www.wizards.com/default.asp?x=dnd/rg/20050906a
Do not add or subtract hit points from temporary changes to
the master's Constitution score or temporary hit point boosts
from spells such as aid or from effects that increase Hit Dice,