I believe he needs a four input device or more, as you said AT...best cost to price and function ratio...Be to ponder out what is available in doing it all?...without too much bugginess, and troubles beyond the said wanting to do with....Was my point being put right?
 
 
...Reasons below, in my details might be averted...and by experience be converted?...lol
 
Cheers,,,Oh I tried the latest Platinum version....WTF.....be mindful...it could take the rest of my life waiting!

I use a Yamaha MG 8/2FX mixer.
I plug all of my mikes and instruments into my audio interface, the Focusrite Saffire.
The audio output of the Saffire goes to my mixer, which has reverb, so everything I hear has reverb, while recording or playing back.
You also have a Yamaha mixer and an audio interface. 

So your listening to Bass with Reverb on it ??

57Gregy
I use a Yamaha MG 8/2FX mixer.
I plug all of my mikes and instruments into my audio interface, the Focusrite Saffire.
The audio output of the Saffire goes to my mixer, which has reverb, so everything I hear has reverb, while recording or playing back.
You also have a Yamaha mixer and an audio interface. 

Great and simple answer thanks man

If you can stand to run your mics and instruments through a mixer before they hit the daw. then a mixer with direct outs on some or all the channels so you can use those outs to drive the daw, run the daw at any convenient latency and monitor the mics and instruments via the headphone jack on the mixer in analog real time.
 
This is how I do it. I monitor the sources directly, adding any effects using hardware reverbs in the mixers aux sends and returns or onboard if available. I don't "print" the effects just monitor the sources with them.
 

Cactus Music
So your listening to Bass with Reverb on it ??

Sure. Why not? This is just when tracking and it's after the DAW, so it's not in the track.
Frankly, with my hearing loss, I can hardly hear the reverb anyway, unless I solo a track or really crank the 'verb up.

bitflipper
You won't be able to do that without a hardware investment: a new interface with integrated fx, a mixer or an outboard reverb unit. Computers just aren't fast enough to use software reverbs in real time.

Get round-trip latency to under 10ms, or for most people under 15ms, and it’s perfectly possible. And modern computers should be able to handle that, given a good interface with good drivers. Making sure the reverb used doesn’t add latency is important as well, of course.

There’s also the half and half way of doing things where the direct signal is monitored directly through interface or mixer and the DAW is used just to add the reverb. That way while you might get a tiny increase in delay time for the early reflections part of the reverb you bypass any excessive latency as far as the direct signal is concerned. At worst it just pushes back the perceived “walls” of the reverb’s virtual room a few feet.

Cactus Music
So your listening to Bass with Reverb on it ??

Nice!

Hey Greg,  I guess if you're used to it and you keep it at a low wet mix you might not even notice.  I need the bass real tight to keep my timing on, reverb makes stuff sound sloppy and to me it is distracting. Each there own for sure. I don't track vocals with Reverb myself as I need to hear my errors and reverb masks the details. But I've had clients who seem to perform better when they have that wall of sound in the phones. 
Since I stopped taking on clients I removed my Lexicon MX 200  from my studio rack and it now lives in my live performance rack. 

Timing? What's that? 
You have a point, and I do have the reverb set low.
I simplified my set up a little in my suggestion to musaed; I really have the audio outputs of my MIDI keyboard plugged into the mixer and the audio outs of the interface, too. I use all MIDI from the keyboard until I'm done (?) and then select soft synths if I think I can find a better sound. I have a pretty old, underpowered DAW computer and don't want to stress it too much when recording.
So, I can turn off the reverb on the MIDI channel of the mixer. I'll try that and see if I notice any 'tightening' of the bass.
Thanks!