Would it do what you want, in terms of providing effects and Wah? Yes. Ant they're based upon older Line 6 technology -- POD XT Live vintage. Apparently you're up on that and find it an acceptable compromise.
Whammy, not so much -- at least nothing convincing, IMO. I've used an XT-Live preset that's supposed to simulate a whammy, and was very underwhelmed. Not even sure if the FX100 has such a capability. (Yes, I do own an FX100...)
Yes, you can connect it to your iPad via Bluetooth to use the Amplifi Remote App for creating and selecting presets. You can also connect to a PC via USB and use the FX100 as an audio device. But it sounds like you're expecting seamless interoperability with your iPad running iOS amp modelers/sims. I don't think that's a reasonable expectation.
Since you mention planning to use it in live setting, let me give you something to think about: The FX100 is about the 'dumbest' pedal board you're likely to encounter. It gives you 4 pushbutton switches, marked A, B, C & D, for selecting a preset, and a two-digit LED display that tells you which of the 25 banks is active. So, if you have several presets that you want to use, you'll have to remember bank numbers and which preset within the bank you need to select. There are no switches for turning on or off any of the effects, so if you need a solo boost, for example, you have to select a preset with a hotter output -- you can't just step on a switch. This is VERY limiting. If you need to switch banks, you have to simultaneously step on TWO of the selector switches to move the bank up, and two OTHER switches to move the bank down. I don't know about you, but I'm not good at this on a dark stage in the middle of a song...
Frankly, I'd think that an Amplifi TT with an FBV Shortboard MKII or FBV 3 would be a much better fit, in line with what you're hoping to do. I have an FBV MKII, and it's far more useful with my Amplifi 30 and Amplifi 150 than with the FX100.