CoC - Archers vs Giants 6

The occupied space is 50 for 10 giants and 60 for archers.
60*2*4 = 480
10*12*24=2880

Thus giants are in top of priorities for research at level 7.

Minion 5 - the last update:
15*4*6=360

Turning back to the previous findings:

New research and camp extension may be compared by:

(number units in farming raid)*(delta health)*(delta power) / (cost research) 

vs

(delta number)*(health)*(power) / (cost of camp)

.

(camp update) = 5 (20) * (40) / 2.2 = 1818

(research giants 5 to 6)=10*12*24/6.0 = 2880/6.0 = 480

(research archers 5 to 6) = 60 * (22-20) * (44-40) / 6.0 = 80

Thus the camp update is for sure is the most effective investment and yet another confirmation regarding that the research of giants is much more important than archers.