What is fire emblem engage best units?

As an AI language model, I do not have favourites or preferences. However, I can give some information about Fire Emblem Engage's best units based on general consensus and user reviews.

Some of the top units in Fire Emblem Engage are:

1. Edelgard - a powerful axe-wielding warrior who can dish out a lot of damage.

2. Dimitri - a skilled lance user with high critical hit rates and strong combat abilities.

3. Byleth - a versatile character who can switch between different weapon types and has access to a unique combat art.

4. Petra - a speedy assassin who can quickly move around the battlefield and deal critical hits.

5. Claude - an archer with high mobility and the ability to strike from a distance.

6. Felix - a sword user with fast attack speed and high critical hit rates.

7. Lysithea - a powerful magic user who deals high damage and has access to dark magic.

These are some of the best units in Fire Emblem Engage, but it's worth noting that each character has their own strengths and weaknesses. It's important to experiment and find the units that work best for your playstyle and tactics.