Folks, I would greatly appreciate your weigh-in on what lighting fixtures/ types I should pursue to fill out what I already have. I'm concentrating on interviews -- generally one-on-one. I currently have one Tota light with umbrella and one Rifa 44 softbox. I'm considering buying a 42" reflector and a pro light with a snoot. The reflector can be used for fill, the pro light for back light. I'm short on fixtures, clamps and the like as well. So I'll be buying a boom stand, barn doors for the tota, as the tota (I believe 750) is very harsh and hot.

Should I start from scratch; should I go LED, fluorescent; is there an issue with mixing tungsten lights with LED or fluorescent? My budget is limited so I'd like to build on what I already have. I've already bought Vortex Video's How to Set up Light & Shoot Great Interviews. But frankly, my EX1r and accessories wiped me out! I don't have another $1500 to spend to replicate Doug Jensen's kit! I'd really appreciate your input. Again, all I intend to do is one-on-one interviews.

Yes there will be issues mixing tungsten and florescent fixtures unless you color correct one of them. Buy the reflector, get one of the Impact | 5-in-1 Reflector Disc - 42" | R1142 | B&H Photo setup's and you will be amazed at how much you use it. The Lowell Pro lights are very handy and I use the two that I have all the time.

If you can, go with dedolights - very easy to use, very nice quality to the light, very sturdy.
IMHO the best lights to use for interviews.

Dedos are lovely but they're also pricey. Give serious consideration to a LTM Pepper 100. Accepts both 100 and 200 watt tungsten, 4-in-1 snoot and focal spot are available.