Its important in the last mission stages of the game. It protects you against Mursaat "Signet of Agony" damage. Without it, you'd drop like a fly. With it, you take 3 damage for each wave of agony. (Thats with FULL infuse)
Don't bother leaving the ice zones without full infuse or you'll be leaching.
so, thats all it does? protects against 1 move? and does it take long to infuse because right now i dotn wanna spend so muhc time on infusing because this isnt my final armor.
its in the mines mission... best way to get fully infused is to just suicide run it and one person can make it to the cutscene. and if you ever want to get past ring of fire you will NEED to be fully infused... (and go through the front gate, its way easier)