(1) Redid a clean installation again, and the problem still occurs the moment refinements was added, just after bg2-tweaks.
(2) Managed to identify all the files edited by refinements. See attached.
refinements2.txt 112.24K 443 downloads
(3) Intuitively I went for the following .2da & .ids files, and retrieved the weidu backups from refinements for the following files and retested with BGRING08.itm & SCRL77.itm. Both items remained unusable by wildmages, unless the flag unusable by wizardslayers was removed.
IDS OVERRIDE/KIT.IDS 2DA OVERRIDE/25STWEAP.2DA 2DA OVERRIDE/CLASWEAP.2DA 2DA OVERRIDE/DUALCLAS.2DA 2DA OVERRIDE/KITLIST.2DA 2DA OVERRIDE/LUWMG.2DA 2DA OVERRIDE/TG#WIZS.2DA 2DA OVERRIDE/WEAPPROF.2DA
(4) So instead, I tried to get the backups of all the ids & 2da files listed in the attachment above. However, it was to no avail.
Each time I tested, I restarted BG2 and created a new wildmage. Is there anything that was missed out? I had the impression that only 2da & ids files would be the cause of such an issue.
Thanks for any advice.