Depends on why you are playing the Tromp. Is this the line you want? Back when I played the Tromp, I wanted to play the Queen's Gambit not Indian defenses. I would play 2. c4 against 1... d5. Against 1.... e6 it depended on my mood, again, either 2. c4 knowing either d5 or Nf6 would normally follow (but you must be ready for 1. d4 e6 2. c4 c5) or 2. e4 and play a French (Franco-Benoni isn't really a problem -1. d4 e6 2. e4 c5).
If the Tromp is what you like, as the Tromp rather than an avoidance line, you can try 1. d4 d5 2. Bg5... or 2. Nf3 ... looking for an early Bg5.
Hi,
I'm curious, for those who play the trompowsky after 1 ... Nf3, what do you play for other openings (like 1 ... d5, or 1 ... e6).