if you mean as in their final evolutions ( torterra and sceptile), iwould would say sceotile. this is because it has awesome speed and can deal heaps of damage through leaf blade.
Leaf blade-STAB quick damage
Toxic-helps do heaps of damage when not very effective
Swords Dance-helps power up leaf blade and rock slide.
Rock Slide- helps deal with pesky fire and flying types and powered up by swords dance.
Hope I helped.