The phrase "divide and conquer" means making a group of people so frustrated with each other that they are not capable of joining together to fight a common enemy. "Divide and conquer" creates a divided focus.
As the infighting grows, the amount of effort and resources the enemy has to invest in the battle decreases, and therefore his chances of winning increase.
Great example of a focused strategy from 
A Common Splinterlands Mistake
Time and time again, I have seen Splinterlands players attack their opponent with divided focus. The results are usually disastrous.
My experience leads me to believe that the player who loses the first substantial monster (high health value monster) will usually lose the game. If my observation is true, it would make sense for a player to primarily focus on one point of attack.
In regards to Splinterlands, "divide and conquer" is not a strategy that your opponent executes, but rather a misstep of the player.
It does not make sense (in my opinion), to only use one snipe or sneak monster in a battle. It would be far better to utilize two or more monsters. I have seen battles where one monster with the opportunity ability can be successfully used in coordination with another point of attack strategy. But overall, I would recommend:
Reduce the number of points of attack to one - max of two.
Utilize two or more monsters for each point of attack.
My overall advice? Fewer points of attack mean more focus. More focus gives you a better chance of dealing the first death blow of a substantial monster.
Spinterlands Point Of Attacks
To date, I have identified 4 strategic points of attack:
First position - the most common point of attack
First Monster with range, magic, or no attack (not in the first position) - monsters with snipe ability use this point of attack
Examples Lowest health - monsters with opportunity ability use this point of attack
Examples Last position - monsters with sneak use this point of attack.
Examples
The First Death Blow Does Not Guarantee Victory
There is a game strategy that includes placing weaker cards (such as Furious Chicken without melee attack) in a strategic position.
Especially in the case of the Furious Chicken (at level 1 and 2), a correct placement of the card would absorb the first snipe, sneak, or opportunity attack. This could be the make-or-break decision that determines which substantial monster (high health value) kicks the bucket first.
Final Thoughts
Pick one point of attack and hit your opponent quickly and with lots of power.
It may be tempting to execute a divided strategy, but my experience tells me that a focused strategy has a better chance of delivering the results you want.
In one of my next posts, I will talk about ways to counter each point of attack.
Thanks for stopping by!
@SumatraNate