You can find a discussion about the value of pieces (here). I don't want to add info here because discussing strategy or piece values in the middle of a game is not allowed. But getting info from other threads is allowed.
Chess on an Infinite Plane (gyrados06 - hitthepin)
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17.Bx(10,10)...Qx(6,12)
18.B(13,7)
Oh we are equal! 
Nov 4, 2018
0
#85
R(-4,8). I suppose the average point values of the two pieces are the same, although the Rook gets better and Hawk gets worse the more trades take place. Which means I might have a slight edge now but you’ll get an edge later. Not sure.
18.B(13,7)...R(-4,8)
R(-4,1)
H(-4,-1)
19.R(-4,1)...Q(-4,12)
20.H(-4,-1)
CxR
20.H(-4,-1)...Rx(-4,1)
21.Cx(-4,1)
B(1,-4)
21.Cx(-4,1)...C(-4,8)
22.B(1,-4)
C(7,0)
22.B(1,-4)...C(8,10)
23.C(7,0)
A hawk for a rook. I wonder which is more valuable?