The Waverazor effects routing is extremely flexible, but that also makes it quite complicated. I have to stop and think about it myself whenever I want to set things up beyond the INIT patch.
In order to activate effects 2 and 3, you need to turn up levels in at least three places. Let's start from the INIT patch and use effects 2 for our example.
Under the AMP nav button, turn up EFX2 SND levels in both the Voice Amp Mixer and the Amp ADSR envelope. Then, under the OUT nav button, turn up the EFX2 RTN level. That will enable the whole effect bus and you should be able to hear whatever effect your choose for bus 2 at this time.
What I just described enables effects bus 2 in parallel to effects bus 1, but you can also have bus 1 feed into bus 2, or into bus 3. Additionally, you can have bus 2 feed into 3, or even go completely serial and feed 1 into 2 into 3. These routings can be set up under the MIX nav button. In the Pre FX Mixer, you will find levels for EFX1 -> 2 lev, EFX1 -> 3 lev, and EFX2 -> 3 lev. Use these levels in conjunction with the effects sends and returns to create the routing you want. The buses can be serial, parallel, or even some combination of both.
One additional thing to note about the INIT patch is that the AMP / Voice Amp Mixer / EFX1 SND level is set to zero. This is because we've assigned the main page FX MIX macro control to turn it up, allowing the player to hear the effect using that knob. The FX BYPASS control is also affecting the EFX1 SND level, turning it all the way down.
I hope this information helps.
All the best,
Taiho
MOK