There is one thing that affects goals from crossing... Heading is part of defence skill tree and people rarely improve defence of attacking players, while opponent's often improve it for their defenders... Anyway, the most goals my team scores from crossing is winger-winger combo or side backs combo... It's kinda funny, 'cause 6 of my 7 wingers are short...

Belgrade United
Black 178
Karaman 172
Bushi 169

FK Partizan
Djogovic 191
Alexon 180
Varela 176
Gulajev 168