north india- 6 weeks?

hi all

i need some advice or feedback if possible. Its a bit complicated! I have six weeks and a few days, a lot shorter than i wanted, im flying in and out of delhi.

After a few days in delhi i need to make my way to bhuj in gujerat. I only need to spend a day in bhuj then i can resume with my plans.
After 4 weeks i need to be back in bhuj to pick up a relative to escort them to Delhi and wave them off.

Im not planning on taking internal flights, just buses and trains

heres my rough iternary

delhi- agra- fatephur sikhri- jaipur -ambedabad to get the connecting bus into bhuj

From bhuj- khuajaro- varanasi (if i feel i can cope)- Kolkatta- darjeeling-then i need to make my way back to bhuj.
Maybe kolkatta to mumbai/ambedabad- then bhuj.

Bhuj- delhi

Second part of the trip- 2 weeks to go.
Delhi- kalka- shimla- mclead ganj- dharmsala- amritsar- Indo-Pak border for the ceremony- amritsar- chandigar- delhi

fly home

if you think this is too ambitious then please let me know.

I might just stick to mumbai- ajanta- kerala before heading back to Bhuj, and leave out kolkatta/darjeeling.