Basically like it as it is but some deeper rhythmic pointing after around 0'34" after the strings get wild might work. It depends what you want. If for example you imagine it accompanying/ portraying a scene with people fleeing or things flying away then be sparing. (Like Wagner's famous Valkyries, there's no real bass. It's big but airborne!). Also - just my view - drums pounding away would mess it up. So it would have to be a staccato/pizzicato accent in the bass carefully placed on a strong beat (which doesn't mean a regular beat).
[edit] As for melodic instruments mixed above or around the strings my personal view is don't, unless you want to reduce their vivacity and impact. [/edit]
Nice start. Very energetic strings.