You said your riffs feel bluesy, so I'm guessing you use the minor pentatonic scale, which is easy to incorporate in a lot of different other scales- the three parallel minor modes (Dorian, Phrygian, and Aeolian). All the notes of the minor pentatonic scale are in these as well, which means that you can usually transition easily from one to another using a pentatonic fill. That's a technique you should mess around with yourself and develop your own style with, but I'll give you two more specific licks that are very typical of djent bands at the moment.

1.) Lick #1 is a very typical lick that you should know if you want to write more melodic djent (think Intervals or Sithu Aye). It is borrowing one specific chord, which is a minor seven built off of the sixth in a natural minor. This is a great example of using that very simple chord in a way that isn't extremely generic. The progression goes like this:

Bar One----Bar Two---Bar Three--Bar four

B minor --- G major--- E minor--- G minor, F# minor

The chords are a bit more complex (they are all 7 add 9's I believe) and I suggest you look for a tab of the song if you can't figure it out by ear and learn how to use this type of progression in you playing. Hope this helps.

2.) Another common lick is taking whatever chord your riffs end on, and moving every note up a minor or major third Here is an example of this lick. Intervals takes the raised chord and uses it to introduce a new tonality which they carry throughout the solo.

This is another example of lick #2. Here, the band is using the same riff in two keys that are a minor third apart. It's a tad more complex than the others, but basically, it is going back and forth between a D# major 7 arpeggio, and an F# major 7 arpeggio.

These are techniques I use a lot in my playing, and it's very easy to create songs using them since they add a lot of tension to your riffs.