Route advice - Greenwich to Kings Cross

Personally I'd stay south of the river.

Greenwich -> Depford creak st -> Jamaica Rd ->Druid st ->left into snowfeilds-> keep going straight on (due to cycle lane contraflows) until-.> Blackfriars Bridge ->Farringdon Rd -> Kings cross

So is staying south a lot quicker? Been thinking I should try that route at some point and I guess I'll be forced to once the foot tunnel is closed.