The heal granted by Into the Fray is in no way dependent upon your Reactive Shield. Into the Fray increases the duration of Reactive Shield by 3 seconds. Entirely separate from that effect, Into the Fray also makes you regenerate 2 energy cells and heal for 2.5% of your total health when suffering direct damage from area effects.
Obviously mr. Peckenpaugh Is working mad hours to answear important posts on the forum. Maybe someday he will come to the VG/PT forums and explain why he deleted all the posts the two Communities made on the test server forums.