Wow - don't use Stereo Tool twice on the same data! Especially the Loudness filter should NOT be used multiple times in a row - you'll get a lot of distortion if you do that. If you set the Loudness to x 4.00 in both versions, you effectively get x 16.00 - and there's a reason why that option isn't available if you use a single Stereo Tool
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For the loudest result, use Stereo Tool at the end of the chain - and only there.
Also, how is the bass without Stereo Tool? By using the Loudness filter you _will_ loose some dynamics, which means that loud sounds (kick-drums) will become softer. In your case, you should only use the Loudness filter to get rid of short spikes in the signal, if you use too much of it you'll loose much of the dynamics of your sound. Which might be ok for FM radio transmissions (all the big stations do this), but definitely not for live performances.