Leveraging teamwork and strategic positioning for the ultimate advantage.
Rockstar is continuing their trend of occasionally compiling and posting various lists of tips to use in GTA Online on the Newswire, their own personal news site. They've previously done a guide to the Freemode Events update as well as a trio of guides for Executives and Other Criminals looking at different aspects. However, recently Rockstar has been hot on releasing new Adversary Modes en masse and players might need a bit of direction in how to make the most of them.
Among the most recent additions (aside from today's Inch By Inch) are Sumo, Rhino Hunt and Drop Zone. These three new-ish modes comprise the line-up of the newest guide released by Rockstar. With Adversary Modes often being the subject of various double RP and GTA $ promos during event weeks, these tips will come in handy when you're looking to collect a bit of cash without repeating the same missions.
Sumo
The first on the chopping board is Sumo, the latest of the Adversary Modes this guide concerns. Sumo was introduced in the recent Lowriders: Custom Classics DLC. As the name suggests, the goal here is to knock out either everyone else, or just the enemy team, of the area in which the match is played.
Regardless of which variation you find yourself playing, vehicle choice is key — probably more so when in a team than when going solo. The biggest and meanest ride in your garage might look appealing at first, however something nimble might be a better choice at times. When you're having at it with a team, you'll need to coordinate with your compatriots to make sure you've got all the bases covered with a wide variety of vehicles.
Whenever two opponents are more or less equally matched, it pays off to lend a hand instead of hunting your own prey. Depending on the score, sometimes sacrificing yourself or a team-mate in a tactical move to take the last of the enemy with you might be a smart thing to do. If you're the one even matched with an enemy, remember to ease off whenever your wheels spin out — forcing the throttle will get you nowhere. A great tactic to end a stalemate is to suddenly reverse and evade to one side, which might cause the enemy to speed off an edge.
Keep in mind that the handbrakes are disabled, so powering full pelt into an enemy only works if you actually hit your target. Any measure of inaccuracy might leave you tumbling into defeat by your own hands. You'll also do well to keep track of the more treacherous parts of the map — your opponents might finish each other off.
On larger maps, that safe zone is usually at the center. Sticking to this area will also help if there is no winner when time runs out, as the sudden death area will keep decreasing towards the map's center.

Rhino Hunt
Moving on to what is possibly the least balanced (on purpose) Adversary Mode in GTA Online, Rhino Hunt tips will help make a one-sided conflict more fair. Quick hunters with infinite lives have 3 minutes to take out one or two Rhino tanks with an inexhaustible supply of stick bombs. The smaller hunter vehicles are vulnerable, but quick compared to the cumbersome tank.
As a hunter, getting in hits to the rear of the tank is desirable, as those detonations do more damage. If you're really lucky and skilled, bombing the ass of the Rhino will take it out with just 7 stickies.
Solo hunters are bound to fail. If you charge your prey in unison, at least some of you will make it through to get some shots in. You might even lay a trap, as the tanks are allowed less wiggle space than the hunters. These traps can also be set by placing sticky bombs in the path of the tanks, not on them directly.
Staying hidden is just as crucial as staying in motion. Hide behind any obstacle or out-cropping, and kill the lights when playing in darkness. Rhinos can't shoot what they can't see.