As a weapon warrior gem, the key point is to ensure that the +3 crit damage on the head is colorful and has special effects.

Generally speaking, both red and yellow jacks are 5 strength +5 crit. As for blue jack, I really didn't find blue jack in the military uniform. It depends on your preference and groove reward. Sometimes it is not necessary to insert the groove reward.

If your strength is too high and your crits are not enough, change some gems with more crits. If your crit is too high and your strength is not enough, you should have some strength.

For soldiers, strength is stronger than AP, because both weapons and Berserker War have a talent to enhance strength, and soldier pk sometimes changes the shield strength to improve the grid value.