The Support gem momentum.

Im Doing a ranger build and i am trying different support gems. Two skill gems i used, Gas arrow and Rain of arrows. With those two im testing momentum.

Maybe i understand it wrong. but it should increase damage after i move. both skills are an effect over time and it should work but i see zero effect. ofcourse its difficult to count exact damage. but it feels like it does nothing.

I'm also unsure, but from the verbiage, this is what I understood :

When you cast a skill, then move for 2 meters, that same skill that was cast will do 40% more dmg. Not subsequent casts.

This seems orientated towards Channeling skills, if permitted, otherwise it would be maybe for a duration skill allowing movement at the same time, but the duration involving new damaging entities generated, so not the Gas Arrow that is still gasing, more like that Cold Salvo one the Ranger has, that gains 1 charge/sec, up to 12 charges.

It that last example, u press Cold Salvo and immediately walk 2 meters. The first 4 salvos, which were generated while moving from 0m to 2m, are doing regular dmg. The following 8, generated after reaching 2m, would then benefit from that 40% more dmg.

I could be wrong, but its most likely along those lines. Given the absence of generic dmg multipliers on support skills, it would be weird if Momentum worked like we want it too. Everyone would use it.