Invisibility, 80% more stability, higher reload speed. Patience and Time also lets you reload your clip in 1 second. (6 Bullets) Ice breaker has slightly more impact (5%), 20% Stability (LOL). But it regenerates 1 bullet every 5 seconds. So it takes 30 seconds to technically "Reload" Icebreaker. I find lots of special ammo, and I always have Synthesis. Since my heavy increases my chance to find heavy ammo I never need Heavy Synthesis. Patience and Time > Icebreaker