Halo 2 > Halo 3 > Halo 3 ODST > Halo Reach > Halo CE
Based on campaigns.
I discovered a trick which allows you to throw tripmines twice as fast.
When you have a mine on instant respawn, throw gour firs mine, then quickly swap weapons and oress x. Keep pressing y and then x twice and you should find yourself throwing mines twice as fast