1)It is very important to Daven שמונה עשרה with a מנין because ה׳ DOES NOT REJECT the תפילות of the רבים 🙅🚫🫂

2)It is extremely preferable to Daven in a בית מדרש or בית כנסת even when davening ביחידות , however if you have a מנין in the office, מנין would take precedent over davening in a shul alone. 🏠🕍

3)If you need to daven alone , still Daven at the same time as your local מנין. R’ Moshe Feinstein ZT”L says even if you have better כוונה when davening alone, it is still more important to Daven with a מנין. ⏰🙇‍♂️