So is it worth splitting some ARDR and going into IGNIS during this phase? I'm a rookie at all this.
You mean splitting NXT? Because the ARDR are not used for the token sale. Your ARDR assets will become 1:1 the Ardor currency at launch.
There is a
post in the NxtForum laying out the scenarios.
You can check for more posts over there. Seems that using NXT in the first funding round will be the most profitable option. There might be quite a rush (well, hopefully for the devs).