Ok I just downloaded this. So far I'm absolutely shit at it. Its fun though
If your internet is shitty, don't try melee and just snipe using like Zaku Cannon, GM Cannon, Gelgoog Cannon (very powerful long range shoulder cannon and they just buffed it to reduce reload time), Zaku I Sniper Type (very long range and decent power when maxed out in the hangar), Super Gundam (long range and pierces multiple targets in a straight line, but there's hesitation betw firing and it actually firing, so often the target isn't there anymore), GM Sniper II, GM Sniper, Geara Doga Heavy Arms Type (which has one long range cannon that does splash damage to whatever nearby impact point). You should be able to do fine with any of these early on, so keep an eye for these in the DP store or Recycle Ticket store.
Sometimes you cannot fire direct hit on enemy, but with splash damage you can shoot the wall (bank shot) the enemy is near and if he's just got a tiny bit of health left, the splash damage can finish him off. Also good for hitting enemy standing just barely behind cover. Just aim for the ground nearby.
Don't forget keeping an eye on the clock and if around 3:00 left, start flying to go bomb the enemy base while you're in pilot mode (outside your mobile suit). With 3:00 left, you should be able to fly to the enemy base in pilot mode from almost anywhere on the map and get there with enough time to plant the bomb (takes 10 seconds or so and then 1:00 to detonate). This tactic got me many wins early on when I sucked. If the bomb explodes after 2:00 left, you get more points ~3k. Not sure if you blow it up closer to 0:00 left you might get even more points ~4k.
Also, don't forget to be mindful of the indicator where the captured beacon is ready for pilot to call in air support to shower down preferably on a cluster of enemy MS. Just respawn there in pilot mode and hold down whatever button it is to call support.
The fun thing about playing sniper is you can do very long range kill shots of the flying MS or buzzer beater kills for the win. The bad thing is your support MS is very slow and raid units can shred you via chaining melee combos until you're dead and can't do anything at all during the long combos. Some MS can do max 3 hit combos and immediately switch to secondary melee weapon and do another 3 hit combo. Those GM Night Seeker V's do that and very unfair since they also have stealth.
Talk to the little girl in the middle of the base camp and do all the tutorials to learn how to do basic stuff. Learn the maps so you know where to take cover and snipe. In one map, sometimes I can snipe thru a very narrow opening and the target can't hit me.
I think the way it's setup, support can do extra damage to generals who do extra damage to raids who do extra damage to supports. When you target an enemy, blue wording will show advantage or white wording will show disadvantage. If you pick the right target, you can wreck shit (over 1/3rd of enemy MS's health per shot), but sometimes you just gotta shoot what they serve you.
If you damage the enemy's legs enough, they will be a sitting duck unable to move fast. If you damage a sniper's head enough, they won't be able to use snipe mode scope and will be limited to point and shoot.
If your MS has grenades, you can lob them very high to maybe get a bit more distance. Something to do while your sniper is reloading.
If you like melee, a few have a Skill called Heavy Attack where you hold down the fire button to charge a bit then let go and you basically plow through friend or foe and do very big damage. If you get hit while charging, you have to start over. These have Heavy Attack, I think: Hazel II, Zaku III Custom, Red Rider, maybe Nero Trainer. When they run the limited time Ranking tournaments, the MS with Heavy Attack come in handy. Top 15 in a each mini-group will get rewards. I should have tried it earlier. I think I got two special MS from top 15 finishes even without maxed out Heavy Attack MS.
Do the Simulation battles by talking to the old guy in the corner. Good way to get useful stuff like tokens, parts, MS.