Still difficult. If you wish you can book 1 tckt in 04010 - ANVT-JBN Spcl trn up to KIR and then take a connecting train from KIR to NJP.
On 15th Oct, current WL is WL# 28, which should get confirmed as this trn is running with 5 3ac coaches.. You can keep this ticket as 2nd option..
Though this trn will run late but Diwali rush hai iss time, so very difficult to get confirmed tickets..