It's easy!

If we use the original characters (Fate stay/Night) we can easily remember it!

Look! If we use the character image it become easier to remember, right?

Strong

Weak

I don't know about that though....

By the way, this is the Chaldea compatibility chart.

Why am I weaker than you!?

Ah... So you prefer to be the one who attacks rather than the one who receives huh....?

Eh!?

How can it be like that....?

I haven't remembered the compatibility of each class....

Is there any easier way to understand the compatibility like the earth, water, fire, and wind elements?

I copied it from the strategy wiki