Portamento? Well, probably the best one for the price is Ladik's C-012. That's got two slew limiters with selectable portamento on up, down, or both CV direction changes. Their C-015 loses one slew limiter but adds a gate function so that portamento happens only on receiving a gate, and this also has the voltage direction discriminator. And the big bonus is that either one of those are only 4 hp wide, so they don't take up a bunch of space. And they're CHEAP. And since these don't use audio, you could put one in between the P/S and the Plaits to help keep P/S crud out of any audio modules.
As for the Polaris...I'd suggest adding a second VCF so that if you want to use it as a phaser, you're set. My suggestion would be another SVF such as Doepfer's A-121-2, which gives you simultaneous low, high, bandpass, and notch filtering.
One other point: you'd be better off if you tossed the Doepfer A-138 in deference to a current version Veils. That's only 2 hp larger than the mixer, but it allows you to have CV control over the incoming levels. Plus, since it has a "breakable" mixbus, you could conceivably use it in a 2-2 or 1-3 configuration, depending on what's needed at the time. Also, tossing the Intellijel Quad VCA for a Veils gives you the same sort of variable VCA response and breakable mixbus, costing $10 more but occupying 2 hp less.