So, since the new composing method came out today, I'd like to share something I noticed:
A +1 item contains 10 points.
For making a +1 item +2 you need to add 20 points to it --> you need your "main" +1 item and 2 "minor" +1 items.
Doing this, you have "used up" 30 points, or in other words, if you would have put those 3 +1 items in to a, say, +4 item, it would have gained 30 points.
Put if you compose them into a +2, this one will have 40 points in it.
--> By composing +1 items into +2, and using the +2 for further composing, you'll get some "extra" points.
Feel free to correct me if I am wrong.