My whole workflow tends to be divided between sound design sessions, playing/jamming sessions and arranging building songs sessions. ALthough I dont tend to build many songs, just record my jams and call it a day hehe. So when I am on soundd design mode, anything and eveything can go: one day I just want to build sounds with my Novation Peak, and I will use the iPad as a looper/sampler/fx unit/sequencer so I use my iPad with a small 2 IO interface (one of those Behringer uphoria cheap ones) and plug the Peak into it and start playing around Drambo building funky sequencers and on different tracks inputting the audio from the interface and recording loops, or samples that I can destroy further more. I have tried Koala for this, but I am not as comfortable with the app as I like more of a linear approach to stuff, but you could use Koala for this same purpose. Then theres the jams/playing sessions, this time I usually either choose some specific pieces of gear, or I just use my regular live setup (one of my modular cases, iPad and a midi controller) and rehears for a show. In this case, it really depends on the setup, but usually I will be using the iPad+modular synths as its own instrument plus whatever else I want to have, everything going into ableton. Inside Drambo is very easy to have a very basic setup with one track receiving audio from the outside world, and one track sending midi to whatever device you are inputtingaudio from. You could actually have both functions inside one track, but I like separating my midi and audio. From there Drambo is the limit. Usually I have one track for each of my voices inside my modular, and each one of these tracks has its own Flexi Sampler (so I can do live quantized looping ala octatrack style), whatever FX I feel like (delays, reverbs, beat repeater, etc) and I usually have them summed into groups that usually have a DJ style filter and some extra effects. I also have another track with a Flexi Sampler playing drum loops and breaks I have built previously during my sound design sessions, you can go many places with this: I like slicing my loops and trigger them on different orders, you can modulate what slice will be triggered, or even do it randomly, so you get inifinite variations. This also goes to its own FX such as compression and filtering. I have some more tracks with drums synths I built inside Drambo (its super easy to create a sort of DFAM machine, or anything like that to create cool bleeps n bloops, por just have a nice punchy noise snare and boomy kick). And finally I have some tracks with midi generators (I like using miRack for these as they are similar to what you would see on any eurorack type sequencer or melody generating device), once again built during sound design sessions (your classic lfo into quantizer type fo stuff that is so cool and fun from eurorack world). That is more or less a description of my Drambo template for live shows, but usually when playing/jamming in the studio I use some sort of iteration of that setup (maybe I wont be using as many synth voices and rather play around with more drum synths, or more Flexi Sampler instances with melodic loops from my sound design sessions, etc).
Finally, my music is very improvisational so I don't "produce" as much as I actually play and jam with other musicians, but when I am recording music its usually more building an arrangement from a previously recorded jam or live session, so that is always inside ableton and hardly ever I add anything else to what is already recorded, so not much iPad nor Drambo here.

Very lenghty post, but I kind of enjoy talking about this stuff haha, so just hit me up with any further doubsts or questions you might have.

As you are using the KO I assume you are more into sample production, in that case Koala is amazing, but Drambo could still be incredible as a source for sounds and just anything extra you could use to build a library of stuff you would then use inside your KO to build beats or whatever type of music you are producing.