Yes the extra 10% is working on nutaku, but its only worth in some cases when that 10% overtakes another off element eido, assuming useful active too, and this isnt something usual considering veterans have plenty of 2k+ atk eidos thanks to +99 stuff, the most recent one that its worth to take into consideration is Icarus since she can overtake some eidos in a wind grid thanks to the 10%, but most of the time its just a nice bonus to have, not gamechanging at all.