Would you mind checking via summing up the damage?
Checked 30 times in Battle of El Alamein campaign challenge difficulty with Eichelberger + Zhukov, Eichelberger + Kluge and Eichelberger + Konev, all tested on 2 stack FAs against 2 stack UK medium tank on plain.
Pair 1: Eichelberger + Zhukov
Eichelberger: Accuracy 2, Artillery Leader 3, Attack Guidance 5
100 Crit, 88, 88, 98 Crit, 90,
79, 94, 81, 85, 95
Zhukov: Accuracy 5 + medal, Artillery Leader 5, Artillery Legend VIII, Artillery Honor Ribbon 3
214 Crit, 158, 226 Crit, 168, 198 Crit,
162, 198 Crit, 217 Crit, 187 Crit, 204 Crit
Eichelberger (E) + Zhukov (Z)
281, 318 Crit (E), 299, 281, 279,
225, 306, 286, 241, 281
Pair 2: Eichelberger + Kluge
Eichelberger
81, 112 Crit, 85, 94, 106 Crit,
109 Crit, 95, 84, 85, 89
Kluge: Accuracy 5, Artillery Leader 5 + medal, Artillery Honor Ribbon 1
176 Crit, 169 Crit, 135, 179 Crit, 174 Crit,
130, 156 Crit, 158 Crit, 179 Crit, 140
Eichelberger (E) + Kluge (Kl)
211, 235, 235, 250 Crit (E), 249,
225, 257, 233, 252, 216
Pair 3: Eichelberger + Konev
Eichelberger
97 Crit, 95, 119 Crit, 85, 85,
107 Crit, 94, 79, 92, 119 Crit
Konev: Accuracy 5, Artillery Leader 5 + medal, Artillery Honor Ribbon 1
106, 115 Rumor, 154 Crit, 116, 128 Crit + Rumor,
105 Rumor, 128 Crit, 132 Crit + Rumor, 135 Crit, 148 Crit + Rumor
Eichelberger (E) + Konev (Ko)
238, 238 Crit (E), 216, 226, 250 Crit (E),
195, 218 Crit (E), 184, 255 Crit, 233