Valencia is in a bad state, but I find it tough in La Liga anyway. Frankly speaking, even Girona and Mallorca are not completely safe yet and that is about 10 teams to still fight for their place in La Liga. I think Celta Vigo won't have much to do with relegation, but of course it could theoretically still happen.
For Celta Vigo I really believe they will probably continue positive trend to not losing, I mean they will be consistent in the rest of this season so I also think they won't have much to do with relegation although theoretically it could happen. For Girona and Mallorca it seems these both teams will also stay in La Liga, but yes I agree that they are still unsafe because the current points are also not too far from Valencia, also their performance is not very consistent lately.
The last 5 matches they have done very well because they always produce points with 3 wins and 2 draws.
The next opponent is Almeria for Celta and I still think the same as you because in this match Celta's chances of getting points are still quite large. and of course this further secures their position in the middle standings.