I have 140 clips I want to render from quicktime to MXF. I want to leave the PC over night(s) to render it out in separate files from the timeline according to the clips.
Free method - place all clips on the timeline, create region for every event and use Batch Render script (Tools > Scripting) to render each region to a separate file.
Another way - Production Assistant, Vegasaur, Ultimate-S, Excalibur... Choose the best for you.
When i use .mxf I always render to a single larger clip with markers showing where the separate clips are instead of a bunch of separate clips. Vegas seems to handle this better and i have less errors at the starts and stops of clips. Though with just over a hundred clips you'd probably not notice this.
Also, if you by chance are working with clips that are in cRGB colorspace, this is a nice time to color correct to sRGB.