This build does have tools to deal with crawlers:
- Locus of Control makes you stun immune; it can even be used when stunned to break it.
- Pseudo Spatial Projection can be cast in advance, when entering an area with crawlers, causing them to miss their opening attack (most of the time).
- I played without Temporal Manipulation, but since you got it: Stasis is amazing against crawlers. Just run in the middle of the area and Stasis yourself to bait the crawlers. When Stasis end you'll have a pack of crawlers around you, and you can burst them or nuke them with Neural Overload.