Redox wah! Dreaded chapter. We had one teacher before reshuffling who did nothing in class. I completely relied on etoos for Reshuffling and couldnt cover redox. If I did, easy CM2 batch. That sir completed redox in 2 days (including titrations and everything). He rushed through our batch and didn't do anything with us as he was shifting to resonance mumbai then and was on his notice period at FIITJEE. No one from our batch can ever forgive him for what he had done. It was just so wrong.
Now to answer your question, Redox is not a high weightage chapter in JEE. For titrations, refer to volumetric analysis. For other parts, reduction and oxidation will be the chapter in most books. Refer to online video lectures like etoos, that'll be ur best bet.