I recommend it. It's monotonous, and even repetitive at times. But you'll never run into a paywall, and you'll never be totally outmatched.
How it works is, you start at level 1 in a match, and with every HIT, not kill, but HIT, you gain experience.
You'll have a fire and ice spell. The ice spell is the one to use for long-ranged combat, as it can freeze your opponent, making them slower.
In Jungle of Orth, rather then going straight for the towers, its easier to break the statues, as they can level up and even get their own power-ups.
What you CAN do, if you feel like doing it, is subscribe.
It does nothing really, except give you an abundance of money, from what I've seen.
If your team is losing, its purely due to your team's skill, and none of the in-game stats ever change how powerful a person is, in online.
This is at least a $9.99 experience, definitely felt guilty not paying at least a little bit for it.