Sequencer render crash

Hi, I could really use some help with this issue.

I’ve been trying to re-tool some old classwork vfx (made using UE4’s particle and blueprint systems) because I want to re-render it with the sequencer’s renderer.

My problem is that every time I go to render it to a video, a set of still images or try to play the level the editor crashes 100% of the time.
The sequence is pretty simple, it’s two particle systems and a flat cube with an alpha, one controlling the health particles and the other creating a green pulse across the floor. I’m also using a post-processing box to control the camera’s auto-exposure to brightness Since I couldn’t figure out how to start the particle systems using the editors I decided to just let them spawn and control the transparency of their materials.

Here’s my log file and a screencap of the items used in the specific sequence. [link text][2]

I still have the version where these are all blueprints, so if there’s some way I can activate them using a replacement for the ‘Event BeginPlay’ node I would LOVE to hear about it please.