Red Plasma rounds,this skill is good enough to learn?

[LastmanStanding]

In game its said very expensive one.

[OIVXII]

someone said its good to use to break shield prime war

[Chemodan]

if it have live time when its bad

[Maverick]

it's the only missile that damages the shield on lvl 50 prime wars (nightmare)' boss.

[Darkness]

Its very very expensive but needed for nightmare difficulty

[PewkiMark]

red plasma 75k shield damage in pw. its the best to use but expensive. also easy way to get rating points.