I tried 3s, 4s and capacitys of 4000-6000 ...... escs of 120a, 150a and motors 4p of 280-600gr ....... after test a lot, for a buggy I recommend the next config:
xerun150a + leopard 4065 + nanotech 3s 5000-6000 ..... for me this is the best config for a 1/8tte (Im using in serious races and the top speed is around 35-40mh

)
SWORKZ BE-1, LEOPARD, HOBBYWING, GENS ACE, SANWA VX, FUTABA 3PL, MBX5R/T, RB5SPSL, FG MONSTER, TC5R, 808E, HYPER8, TF5, ZX5, NANO-TECH, HYPERION, 620DMG, ECO6-10, TEAM-IHOBBIES