Ye Mingqiu wasn't adept at magic; his control over techniques was quite poor, and his grasp of details was even worse beyond remedy. (Compared to Tang Ruobing)
Often, the damage from charging a spell might not even compare to a single regular attack, so he basically never considered using attack-type spells normally. Nevertheless, attack spells could still perform quite well in specific circumstances.
This was also his core purpose for persistently learning magic - to compensate for his shortcomings!
Massive rolling boulders, burning oil barrels, and sharp stone projectiles the size of millstones piled up on the mountain peak; once dropped, they could deal devastating damage to his team. Silently climbing the rock wall was impossible, and the Blood Energy Sniper Cannon couldn't fire bullets that would turn; direct attacks would miss the target.
