T-50
Moving up to Tier 5 is the Russian Light tank, the T-50. This small, well-armored vehicle is able to maneuver around the battlefield with ease and can shift from active scout to harassing flanker depending on the given situation. This is thanks to the T-50's higher turret traverse, overall speed, and mobility.
Clocking in at a similar speed to the Luchs, the T-50 boasts a higher power-to-weight ratio, making it a nimble spotter for the team. Couple this with the signal range and the T-50 can stray pretty far from the pack without worrying about missing out on transmitting enemy locations.
Even if the T-50 does stray far from the pack, it's able to chip away at enemy tanks with its high rate of fire and large ammo capacity. Keep in mind that you shouldn't attack head-on while using the T-50; instead, it's best to rely on its speed and handling in order to run rings around the enemy.