JEE Dropper Coaching rec.

Guys I am thinking of taking a drop year for jee. Which coaching is currently the best. I am mainly looking for Althan/vesu area or something near that. Coaching near Adajan or so will be very far. So what i am looking for is that they teach concepts from the very base level and everything and if not based level and their teaching should be good. Also I am very serious about this whole thing so i'll be nice if they actually teach good enough for jee. I was in coaching before and they didn't teach shit for jee. It was a Jee coaching but they only taught board level and when asked when will you take jee classes they said in 12th, like Tf ? Or would you recommend taking an online course and studying in a library? I was thinking of doing that but i am not sure if online coaching and a few books like modules, reference books, etc are enough for clearing jee adv. My goal is under 1000> like ngl online teachers or specifically pw batch teach really well but i heard offline coaching gives special materials or something? anyways let me know please, it'll be great.