Pedalboard ideas

Tough without knowing how you're running your amps etc but..

1) OVERDRIVE/BOOST
The Eternity and Zendrive although different tonally have a bit in common in terms of gain and compression. You already have a good clean boost too. I'd suggest adding something like a TIM/Timmy, Red Snapper or similar which excels at a less compressed, slightly grainier low gain tone.

2) TREMOLO
So many good ones are available depending on the complexity and footprint and what style of trem tones you are after. I have a Cusack Tap-A-Whirl which is very nice sounding and flexible. I was also really impressed with the Dr Scientist Tremolessence for a smaller footprint reasonably priced trem with a lot of wave/tonal options.

3) REVERB
I don't tend to use live because the rooms we play in are often a bit washy already. I add a touch of delay to solos and textural parts & run dry the rest of the time leaving it to the sound guy to interpret the 'space' through the front of house mix. I'm sure someone else will chip in with some good 'verb recommendations.

 

Sorry...I amended my post a bit after reading your signature with the guitars/amps listed.

You don't find a bit too much overlap with the Zen and the Eternity?

If it were me I'd swap one out and press the Snapper into service... although having had both a Snapper and the Timmy I did find the Timmy even more unique as a power amp style low gain drive.

 

I've been fairly impressed with the Line 6 verbzilla pedal. When you hear it by itself you might not absolutely love it but in the mix of a band in a live room, it's pretty unbeatable for the price and size.

 

I'd agree that the Verbzilla is killer for the price and options. I have one. While in the past, I haven't used it much (didn't have enough power supplies), I'm really liking how it sounds live with just a touch of reverb on there for my more country/bluesy sounding stuff. Funny, I bought it for the cave setting, but I find delay is better for that ambient sound. I'd love to see how it stacks up to the Nova Reverb though...