Positioning Extruders after Tool change : Marlin 1.1.6

I'm currently working on a project which uses two extruders. One for making an impression in a powder and other one to dispose a liquid in to the impression made by the first extruder.

I'm currently manually writing gcode for the purpose, and have some doubts about gcodes and setting up a second extruder. I've once configured a dual extruder system, but it uses old marlin and current one has a variety of dual extruder system, so confused about which one to choose.

Firmware : Marlin 1.1.6

Machine : custom made

Board :  Ramps 1.4

configuration file : Configuarion

Dual extruder setup: two nozzles with separate stepper motor for each nozzle. For the sake of simplicity let's say something like this

Which category does this one go?? By reading marlin documentation it doesn't belong to any special category (???)

I only changed following in FW,

#define EXTRUDERS 2

#define TEMP_SENSOR_0 5
#define TEMP_SENSOR_1 5

I tested by sending T0 and T1 to select extruders and extruding them

Do I have to change anything else??

This is the test gcode:

G28       ;home

T0        ;select extruder 1
G0 X20    ;move to X 20
G92 E0    ;set current position of extruder as 0
G1 E10    ;extrude 10 mm
G92 E0    ;set current position of extruder as 0
G1 E-10   ;retract 10 mm

T1        ;select extruder 2
G92 E0    ;set current position of extruder as 0
G1 E5     ;extrude 5 mm
G4 P500   ;give a delay of 500 ms before next move

T0
G0 X 30
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G92 E0
G1 E5
G4 P500

T0
G0 X 40
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G92 E0
G1 E5
G4 P500

T0
G0 X 50
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G92 E0
G1 E5
G4 P500

T0
G0 X 60
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G92 E0
G1 E5
G4 P500

T0
G0 X70
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G92 E0
G1 E5
G4 P500

T0
G0 X70
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G92 E0
G1 E5
G4 P500

T0
G0 X80
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G92 E0
G1 E5
G4 P500

What it does is:

1. After homing, move to given position
2. Actiavte Extruder 1 and extrude some (make impression)
3. then activate extruder 2 and extrude
4. move to next position and repeate

What I actually want is:

1. After homing, move to given position
2. Activate Extruder 1 and extrude some (make an impression)
3. then activate Extruder 2
4. move Extruder 2 to the position where extruder 1 extruded material
5. extrude material (by extruder 2)
6. move to next position and extrude

one way to achieve this is add an additional code after enabling extruder 2

eg:

T0
G0 X 20
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G0 X15   ; if X offset of E2 from E1 is 5mm, assuming no Y offset
G92 E0
G1 E5
G4 P500

T0
G0 X 30
G92 E0
G1 E10
G92 E0
G1 E-10

T1
G0 X25
G92 E0
G1 E5
G4 P500

In plastic extrusion this is normally done by setting offset in Slic3r.

Is there any other way to do this, position E22 to the position of E1. Is there any specific G/Mcode for it?? There's a provision to set offset in Marlin. But this is what it says in marlin documentation

"Z hotend offset only available with DUAL_X_CARRIAGE or SWITCHING_NOZZLE."

Does it work with normal dual extruders.?(Does mine come under any two system mentioned above?)