Best combat bonuses your character ever had?

[Gans]

Mine are these:

And I didn't even cherry pick them. Put him as commander only so he could die already and let his son inherit, but now I have second thoughts about that

 

[Dahoota]

Seriously, most useful? Siege leader + 32 martial as a Viking. Glorious.

Holy warrior + winter soldier is probably the most devastating combo I have seen in combat. It's all pretty situational though. I usually try to pick up whatever troop specialty is relevant to my cultural retinues.

 

[LeSingeAffame]

Siege Leader and Organizer are my personnal favourites. You basically take every one of their castles and they are never able to fight until you decide that you have the advantage.

 

[Ciniod]

26 marshal leader with Winter Warrior, Inspiring Leader and Organizer. My empire was in the Scandinavia/Russia region...