I recommend allocating a minimum of 4 GB ram, as loading on anything fewer may not be possible and if it does load, will lead to consistent FPS drops ingame.
Install Theve
Step 1
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Step 2
Type in the modpack name (Theve) or paste the following url into the search box.
Step 3
Finally, click Install at the bottom right of the launcher after you select Theve from the list on the left. The launcher will handle everything else!