I think they make an unbeatably powerful pair, with the OT slaved to the Pyramid and the OT sending MIDI LFOs and CC sequences to modulate the Pyramid’s midi FX.
p-locking multiple CCs per step, setting up different time bases per track, and doing simple x0x style sequencing are all faster operations on the OT. and of course there are the non-probabilistic trig conditions that the Pyramid lacks.
but overall I prefer using the Pyramid for sequencing notes and chords, multi-bar automations, and creating and triggering different pattern variations per track. you can get the best of both worlds with the combination of the two, but of course you should be ready to navigate a lot more complexity and two fundamentally different menu systems. (I prefer elektron’s but accept the Pyramid for its unique capabilities)