Embers at lower tiers are amazing if you do the following:
- Get it to Rank 4, max level (4 stars, at level 7). If you go higher than 4 stars, you will get opponents that are much stronger than you....welcome to Mech Arena's match making!
- When using the ember guns, try not to shoot them at the same time. Learn to delay one gun for 0.5 sec (or close to it) before firing. What this will do is to put overheat on the target from the first gun and extra damage from the second. This method will also chew through mods quickly at higher tiers.
As for Frags, it's great at lower tier on scout mechs (Slingshots, Killshots, etc) and still decent at mid tier if you have good situational awareness (i.e. how many enemy mechs around, areas to break FOV, etc). You want to be able to slip in, slip out with the frags, you'll actually killl faster than Embers. On Ares at lower tier is ok since your shield and HP will keep you alive. But, higher tier, you'll be too slow to flank and play hide and seek. You'll be a one trick pony most of the time against decent players.
As for implants if you use a pilot, my choice is distance first then damage. You'll want the distance implant first due to how slow Ares is.
Hope these tips and suggestions help. Good luck!