So, basically, I found this article on accident, but I think this will help others get a better ending (I don't know if this would count as a spoiler or not, so here goes). If you want your Shepard to live, then you have to have your Readiness Rating practically all the way up. Yup. That's about it. So, here are all of the endings that would happen with the Rating someone would have:
Readiness Rating < 1750 – Earth is destroyed regardless of whatever decisions you made.
Readiness Rating 1750 – Choose to Save the Reapers and the Earth will be saved.
Readiness Rating 2050 – Choose to control a Reaper and the Earth will be saved.
Readiness Rating 2350 – Choose to destroy the Repears and the Earth will be somewhat destroyed
Readiness Rating 2650 – Choose to destroy the Reapers and Earth is destroyed.
Readiness Rating 2800 – Earth and the Galaxy will be saved once you’re able to create synergy
Readiness Rating 4000 – Choose to destroy the Reapers and Save Anderson to see Shepard lives.
Readiness Rating 5000 – Choose to destroy the reapers and not Save Anderson to see Shepard lives.
Also, a way to increase your R.R. faster is to play the multiplayer. Hopefully I helped in some way sweatdrop . Also, here's a link to the article talking about it:
Mass Effect 3 Endings Guide
Readiness Rating < 1750 – Earth is destroyed regardless of whatever decisions you made.
Readiness Rating 1750 – Choose to Save the Reapers and the Earth will be saved.
Readiness Rating 2050 – Choose to control a Reaper and the Earth will be saved.
Readiness Rating 2350 – Choose to destroy the Repears and the Earth will be somewhat destroyed
Readiness Rating 2650 – Choose to destroy the Reapers and Earth is destroyed.
Readiness Rating 2800 – Earth and the Galaxy will be saved once you’re able to create synergy
Readiness Rating 4000 – Choose to destroy the Reapers and Save Anderson to see Shepard lives.
Readiness Rating 5000 – Choose to destroy the reapers and not Save Anderson to see Shepard lives.
Also, a way to increase your R.R. faster is to play the multiplayer. Hopefully I helped in some way sweatdrop . Also, here's a link to the article talking about it:
Mass Effect 3 Endings Guide