Holographic Scope is another sniper rifle mod that will increase crit chance up until the first critical hit landed. Sleek Bolt is a sniper rifle mod that will increase crit chance and higher versions will even boost the damage. Sniper: For snipers, players will usually want to look for weapon mods that will boost crit chance and accuracy, like Optics and Precision.The Utility Belt mod on boots will reduce cooldowns on frag and stem grenades, which can work nicely with the Frag Grenade Mastery skill. Scout: For scouts, players are going to find increases to accuracy extremely helpful (Precision), while lowering cooldowns can allow for traveling of greater distances and more attacks (Precision).It is also a viable option to equip the heavy with more armor due to its lack of mobility.

Heavy: For heavies, players will find the most success if they emphasize increasing grenade usage (Opportunistic) and healing from the damage they do (Bloodlust). The Utility Belt mod on boots will reduce cooldowns on frag and stem grenades, which can work well with the Boom Grenade skill.Here are some general tips for how to gear up your characters based on their class:

Xcom 2 best weapon mods