Between him, pinsoglio and perin i would stick with Tek for now. Despite his horrific form the other two are not suitable to be keepers here even on their best day.
I would continue with trying to rejuvenate until we have no option but to bench or the january window comes around and hopefully we have an opportunity to bring in somebody new.
Perin was a great GK for Genoa but, in better times, I don't want him as even 2nd keeper for Juventus