The safest way to secure a wig is the lightest method that keeps it stable. You do not need glue for every wig, and you should not use tight combs just because they came sewn into the cap.
For daily wear
Start with adjustable straps and a wig grip. This combination works for many people because it adds tension and friction without adhesive.
For hair underneath
Combs, clips, and bobby pins can anchor into braids or flat hair. Move their position occasionally so they do not pull the same fragile spots every day.
For lace-front security
Tape and glue give the cleanest hairline hold, but removal matters. Use proper remover and never peel lace off dry adhesive.
Bottom line
Secure the wig with fit first, grip second, and adhesive only when the style requires it. A secure wig should not hurt.