I use HIE with a B+W 093 filter, TTL meter set at 1250 to 1600, and develop in Diafine or DiLuxol Vitesse. I suspect that the best meter settings for TTL use need to be adjusted by trial-and-error because different meters will respond to the filter differently. I modified a Pentax digital spotmeter for IR use, but rarely use it.
There was a previous APUG thread about developing HIE (there was a url link here which no longer exists)
I shoot HIE with just a "plain" red 25 filter. My two major observations have been that:
1- with the red 25, you have more than enough visible light to not bother with focus adjustments
2 - if there's a lot of vegetation, I need to really, really pull my development. Vegetation in bright sunlight is _so_ IR reflective that I my highlights all but explode in my +1 stop bracket shots, and they're pretty hot at the indicated exposure, too. this is even with my tendency to rate HIE at 800 with lots of vegetation.
Two books that I have and found to be very useful are Infra-Red Photography: A Complete Workshop by Hugh Milson and Advanced Infrared Photography Handbook by Laurie White Hayball. Lots of content around capture and film development.