Please help,

Engine M20B25 with 12valve 885 head.

Want to use 6 IGN coils. Can you help me please and tell which type is best for this head? Active or passive?

What i need is: long life of coil, best possible spark energy and easy mounting (something which can be mounted on this head without big modifications)

If somebody had experience with this setup, can you please tell me the Coil numbers?

(New, good quality silicone HT cables are always recommended.) Otherwise, if you stick to have 6 coils, you can use the ones from M50/M52/M54 series like in this thread:

Logical driven coils from VW/Audi 1.8T and later TFSI engines are the strongest cheap possibility, but possibly harder to mount without custom made HT wires.