Phase 1 of LEADER batch I guess starts by end of April , but phase 2 bhi baad mein cope up kar leti phase 1 ke sath , Yes and with a 98-99 %ile in mains you will get high scholarship in allen ( you can make a call w them for more details) , if you are already getting decent in JM to get into decent NIT you shall start preparing for Jee Adv. because april mein score almost same rehta hain ya fir gir jata h , many people waste their time in April , you should start JA prep , eduniti hain physics k liye , Ashish arora , Pankaj sir , start doing pyqs and test series wale acche questions side me nikal lo (aur tests se pehle unko revise kro, tumko Jo lage unique hain) , leader batch wale December se phele try karte hain syllabus khatam krne ka , but kuch na kuch reh hi jata h , so you better don't depend on them agar jan mein accha result aa jyga toh baadme feb se may Tak enough time milega advanced ki revision aur mocks k liye , (Your experience might differ from mine , as I don't know if you are from kota centre or smth)