For ranger, not a damage increasing spell or ability could work with throw.
At the present, the best way of throw is for rogues: throw a flask of oil with bonus action, a candle which will set off fire, and another flsak of oil.
Thrown potions will effect right away.
As for rangers, they had better concentrate on attack, not throw you enemy to another enemy (merely 2d4+2 in total).
how can rogues throw with bonus action?