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.
Celta schedules until end of this season is not so difficult that so far only Real Madrid and Barcelona are strong teams they will faced and besides those teams Celta only faced mediocre teams and i think Celta chances to survive in Laliga is quite high because recently they were has showed good progress even i have feel that their position will be stayed in the top 10
And for Girona and Mallorca i think they also will be survive in Laliga and if talking about relegation zone i think one spot will belongs to Elche and for Valencia although their positions currently at 18th but they still have good chances to out from those zone and actually it is very difficult to predict which teams will be relegated this season because difference points between teams is not so wide but i have counted there are at least 7 teams whose positions are not completely secure including Sevilla