30% more healing amp mean my ranger can hit himself for 188 on a heal scroll and up to 250 on a maximized CSW.
30% more healing amp and most of my party (we've got a lot of claw-sets now) means my cleric can heal a group 95% of the time using just MCLW and scrolls, rarely have to throw out a mass-heal.
30% more healing amp mean when my ranger is tanking sulu in tower he can be kept alive with RS aura while the cleric dumps all his SP into Divine Punishment.
30% more healing amp mean when my fighter is tanking Horoth his FvS can keep him alive using just scrolls and his free CLW, allowing for massive amounts of Divine Punishment and searing lights.
30% healing amp means bards can easily keep us all alive in Epic Devil Assault.
30% healing amp is better than approx 4% more DPS.