I think such a section would gain the most attention if it was placed at the top of the right column. There's really nowhere in the left column that would work – "Recent updates" is too important to have anything else above it, and the "RuneScape Wiki" section is too out of the way. Since people were against removing the Main Page poll in the Editing guides thread, and also against removing the CTI in this thread, putting it in the same box and above the CTI seems to be the best option. Here's what it would look like.
Since that makes the Editing and Maintenance columns of the "RuneScape Wiki" section kind of redundant, I took them out and reworded/rearranged the other columns. Here's what it would look like.
I've also added a line below each header to separate it from the content, as shown in the screenshots.
Support --07:00, May 16, 2017 (UTC)
Support - I lacked the technical knowledge to do this myself but I really think the editing guides/projects need more mainspace exposure. I do think the CTI looks really out of place though, can we seriously consider not having this on the mainpage?15:32, May 16, 2017 (UTC)
Support New editors (especially new long terms) are almost non-existent right now.
16:38, May 16, 2017 (UTC)
Support Atlandy 17:02, May 18, 2017 (UTC)