2. Role diversity: Strike, Tech, and Support are the three different types of Sync Pairs. Strike Sync Pairs may do more damage, Tech Sync Pairs can debuff the enemies to reduce their stats, while Support Sync Pairs can heal your own teammates. You should try to balance your Sync Pair types to have an adequate representation of each type.

3. Synergy: You should make sure that your Pokemon and trainers have good synergy with each other in terms of strengths and movesets. Sync Pairs that have complementary skills and movesets can translate into seamless battles and ensure that you can perform well against any opponent.

Movesets:

In Pokémon Masters EX, movesets are essential as they dictate what your Pokémon can do. A good moveset can fundamentally influence the course of a battle. Ensure that your moveset is well balanced, providing you with a good mix of offensive and defensive moves to keep your foes at bay.

1. STAB: STAB stands for Same Type Attack Bonus. It is the extra damage bonus that a Pokémon receives when they use a move that's the same type as their Pokémon. So, a Normal-type Pokémon would gain a boost to their Normal-type moves. It is important to consider STAB when selecting moves.

2. Boosts: Some moves provide your Sensor Pair with boosts. For example, a move like X Attack can increase your Sync Pair's Attack stat temporarily. You should consider using moves that can provide such boosts to increase your performance in battle.

Sync Pairs:

Sync Pairs are a unique feature of Pokémon Masters EX, where you have a trainer and a Pokémon working together. You’ll need to identify the perfect Sync Pairs that complement each other to take on your opponents. Bear in mind that the hardness of a battle determines which Sync Pairs you should use.

1. Strong Pair: Your Strong Pair should be the one with the most damage-dealing capability. It should have the highest Attack or Special Attack stat as well as powerful moves like Stone Edge or Thunderbolt.

2. Tank Pair: A Tank Pair usually has high Defense or Special Defense stats. It can take hits from the opponents while also minimizing the damage taken by your team. They can also heal themselves or others, as well as debuff the enemies to reduce their stats.

3. Support Pair: Support Pairs provide buffs to your team, i.e. shielding them from attacks, healing, and increasing stats like speed. Support pairs should work hand-in-hand with your other Sync Pairs to ensure full coverage.

Gameplay:

The gameplay of Pokémon Masters EX is easy to understand but challenging to master. You will need to hone your skills by practicing battles, grinding co-op battles, and levelling up your Sync Pairs.

1. Timing is everything: You need to pay close attention to the timing of your moves. Know when to use buffs, heals, and energy points. It is not always wise to use every move all at once.

2. Hone your Skills: The more you practice, the better you become. You can grind for experience as much as you wish. You should also complete the daily log-in rewards as they provide you with items and resources that can help you progress.

In conclusion, Pokémon Masters EX is an enjoyable and challenging game that requires careful planning and strategy from its players. With the right team composition, movesets, Sync Pairs, and gameplay, you can take on opponents and become a great trainer. Remember to balance your team’s types, trainer types, and Synergy. Try out different Sync Pairs and Pokemon to discover which work best for you. Finally, practice makes perfect - so don’t hesitate to keep grinding and mastering your skills!