Rule question for Eldritch Horror

greetings,

got a short rule question for eldritch horror. Lets assume I need to do a willpower roll for a combat encounter and i own multiple pieces of equipment, which am i allowed to use?

I got:

• A small item for reroll of one dice
• A weapon that gives me +X willpower for combat encounters
• Another small item that gives me +1 willpower in general
• An ally that gives me +X willpower for encounters
• A second ally that gives me +X willpower for encounters
• An ally that gives me a reroll on one dice

From my understanding of the rules, i would be allowed to use all of my allies, the small item that gives rerolls and the weapon or the small item with +X willpower, is this correct?