Towards the Orcs' immense attack, the humans were somewhat disadvantaged.
Although they had advantages in many areas such as in the training and equipment of their troops, the Orcs had their gods as well as their crazy, immense morale that was being sustained. Nearly every Orc had at least one or two auxiliary spells on them thanks to the Orc gods, and this immediately mitigated all the original advantages that the humans had.
Since both sides were somewhat even now, the deciding factor for the outcome of this battle would be battle spirit and the command of the higher-ups.
As for tricks, well, on a battlefield where numerous people were being killed, there wasn't much space or time for that.
After all, there was a saying that said, "only bravery wins in war." Tricks and sly calculations would only work on paper or in theory.
