What's the best way to analyse this potential divider circuit?
The best way to solve a circuit with multiple sources of voltage and current is by using the superposition principle: Remove the current source from the circuit and replace it with an open circuit.
Calculate currents and voltages.
Then return back to your original circuit and remove the voltage source and replace it with a closed circuit.
Recalculate currents and voltages.
Then for currents which pass through the same node add those currents.
And for voltages between the same nodes add those voltages.
(Don't mix up the signs).