Hannibal mongoose because it can go trhought splip space
You're all going to laugh, but I'll personally take an ONI Gungoose over any other vehicle. It's great for hit-and-run against Spartans and warzone bosses alike. Besides, it can take a heartseeker barrage and keep on driving. Just be sure to run the shielding armor mod, or you'll die long before it takes enough damage to explode. It's just a fun, tough-to-kill midgame vehicle.