ALLEN FOCUSES ONLY ON TOPPERS ?

Hi I am a 10th grade in WB, confused in which coaching to choose for JEE. I decided to go to allen kota, but later cancelled due to many issues there rn. Then I decided Allen Jaipur. Now my friend who is joining motion Kota . Is telling that he is cousins and friends who have studied from Kota say him that in Allen when you are in an average batch you were given not so good teachers, and the toppers are filtered out and given best teachers. THUS HE SAYS ALLEN IS FOR THE TOPPERS WHO ARE IN STAR BATCH AND ALL. FOR SELECTION % MOTION IS THE BEST. I WANT 500-1000 RANK IN ADV DESPARATELY.

HELP ME EVERYONE ! AND IF ALLEN THEN SHOULD I OPT FOR ALLEN JAIPUR OR ALLEN NAGPUR OR ALLEN KOTA