My experience with this instruction vary. Depending on Your squad, You should choose type of play You want to play. It is not advisable to push up if You hav slow defenders. It is not advisable to play high tempo game if you have slow attackers. It has nothing to do, in my opinion, with conflicting orders to Your team.
I did mix up tactical instruction numerous time, I also use asymmetric formation a lot. This means You do not have defensive shape by default, so You do want to mix it up with player, or even team instruction to get result You want. High pressure/low tempo/counter attacking is possible to play, but it needs very long time to get Your team playing like You want them to. More team/player instruction, especially ones that are generally in conflict one with another WILL give You headache in start, first month or two certainly, but it does not mean it will not work in general.
Stand off option WILL NOT WORK if you have team that generally lacks anticipation and decision. It will make You more vulnerable to opposition attacks, no meter how good your set up seems to be. Wise versa, teams with low aggression, bravery, tackling and decision will not give you good results with hassle, due to logical conclusion that they will be bad in duels.
So instead to starting creation of Your tactics based on team instruction and how You wish to play in general, start paying attention to players at Your disposal instead.
Sometimes it is good thing to mix it up a bit.
For example, I had in my team fast front line, fast back line, but midfielders could have little more pace. My back line was very low on areal ability. Normally, because of their characteristics, you would prefer them to push up because of this. But, since my midfield is not as quick as I would like, if I become more aggressive, It would lead to formation breakdown, since my midfield is not quick enough to put a pressure and return to their position on time. So I would prefer to have my lines tight and to narrow the gaps. So this leads us to general conflict to team instruction, according to You, that I should not mix up push up and stand off instruction. And I can tell You, from my experience, it works best with control strategy, wide play, short passing, high tempo game. It just needs time to team get grasp on style of play.
Furthermore, I believe that any combination CAN be successful, depending on Your squad and your opponent. If You want to defend deep, You need physically and aerial strong defenders. If You want to play counter, You need to create space for counters, and while physical qualities of Your squad does help here, best option here is to look for technically and mentally strong players. It is enough to have one fast player for fast counter game.
I did mix up tactical instruction numerous time, I also use asymmetric formation a lot. This means You do not have defensive shape by default, so You do want to mix it up with player, or even team instruction to get result You want. High pressure/low tempo/counter attacking is possible to play, but it needs very long time to get Your team playing like You want them to. More team/player instruction, especially ones that are generally in conflict one with another WILL give You headache in start, first month or two certainly, but it does not mean it will not work in general.
Stand off option WILL NOT WORK if you have team that generally lacks anticipation and decision. It will make You more vulnerable to opposition attacks, no meter how good your set up seems to be. Wise versa, teams with low aggression, bravery, tackling and decision will not give you good results with hassle, due to logical conclusion that they will be bad in duels.
So instead to starting creation of Your tactics based on team instruction and how You wish to play in general, start paying attention to players at Your disposal instead.
Sometimes it is good thing to mix it up a bit.
For example, I had in my team fast front line, fast back line, but midfielders could have little more pace. My back line was very low on areal ability. Normally, because of their characteristics, you would prefer them to push up because of this. But, since my midfield is not as quick as I would like, if I become more aggressive, It would lead to formation breakdown, since my midfield is not quick enough to put a pressure and return to their position on time. So I would prefer to have my lines tight and to narrow the gaps. So this leads us to general conflict to team instruction, according to You, that I should not mix up push up and stand off instruction. And I can tell You, from my experience, it works best with control strategy, wide play, short passing, high tempo game. It just needs time to team get grasp on style of play.
Furthermore, I believe that any combination CAN be successful, depending on Your squad and your opponent. If You want to defend deep, You need physically and aerial strong defenders. If You want to play counter, You need to create space for counters, and while physical qualities of Your squad does help here, best option here is to look for technically and mentally strong players. It is enough to have one fast player for fast counter game.