Officer
The officer is the most supportive class out of all 4 but saying that you can still get some really good kill streaks. The officer's guns are all pistols which are great for headshots as some can 2 shot headshot. I recommend the blurg as the fire rate is decent and the headshot damage is amazing. The s-5 is also good but shines with reduced recoil as you can see the difference and hit a lot more shots. This gun also 1 shot headshots specialists. The officer's health is decent at 150 so you can take a few shots. Ability wise the officer is pretty strong with the flash grenade which won't get you many kills but will enable you to get the kills. You have to throw it in and detonate it yourself, so keep hat in mind and the blast radius of it is big so as long as you throw it near them, it should hit. You can also detonate it mid air so if you miss them, you can detonate it as it passes the enemy. The middle ability allows you to give health to your allies. The base ability gives health just your allies and not you but once you get the upgraded version of it, you can give health to yourself. This is really handy as anytime you get low on health, you can just get some health easily. You can also give health to heroes, so keep that in mind so if Yoda is about to fight a group of enemies, give him some health. You also do get some good battle points of this so try and maximise the amount of people affected by this. For the final ability I recommend the squad shield as it comes in handy a lot. You can use this when your team needs protection from snipers or in a choke. You can also use this to protect yourself if you are getting an objective or get flanked. The default ability is a blaster turret which gets you free kills. This only attacks infantry but gets you free kills as the only thing you need to do is to place it in a good spot and stay alive.