...from Paddington station to Cannon St tube station on public transport?

I have a few suggestions not sure which would be the quickest:

1) Paddington to Cannon St tube station east bound, ie via Baker St and
Liverpool St
2) Paddington to Cannon St tube station west bound, ie via Victoria
3) Paddington to Oxford Circus on Bakerloo line, change to central line to
Bank, 7-10 mins walk to Cannon St tube station
4) From Paddington, walk to Lancaster Gate (10 mins) and catch central line
to Bank. 7-10 mins walk to Cannon St tube station
5) Paddington to Moorgate on circle line, 15 mins walk to Cannon St tube
station

Are there any other routes, and how long should I expect the journey to
take?

Thanks in advance