AR blessing setup

Hey, so with the new mechanisms I am reorganizing my offense team, and my idea is to just have my +10 DC/Iotes Shield Camilla enemyphase the whole team. With summoner support she will have 46/56/46/32/35 spread by herself before flyer bluffs.

Just a question, do blessings and ally support stack? I want to pair her up with my two Eirs and was wondering if she will receive double blessing/ally support, which would mean +10/4/4/4/14

I also have lvl 3+1 offensive fort so she should get those extra stats too...