Both are normally outstanding players, Tarasenko probably more dynamic in the pure scoring department, however, I have always been an Arvidsson fan.
And I think their talents are close enough so that it would warrant keeping Arvy over Vladi.
Given the fact that Vladi is also struggling (along with most of the Blues team) this season, to me, that makes the decision even easier : Go Arvidsson.
As for Arvy's "streak"...yes, he CAN be streaky, but honestly, he tends to streak more on the positive side than the negative, and he mostly can be counted on for consistent production and peripherals such as SOG, GWG, and PPP.
He plays on a winning team that honestly, has NOT really played their very best hockey yet, but would like to be on that Arvy bandwagon when they finally do.
Arvy all day long on this one.