Ok so I'll explain my current situation in the next paragraph. If you want to skip to my actual precise question just skip this to the end of the post.
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So my name is Sam and I'm a 21 years old amateur keyboardist from Montreal, Canada. I've started piano when I was 15 or so and played it for a year and a half and then left classes to go self-taught. I've mostly played songs I liked at home (mostly metal) and was actually satisfied with my level (which is pretty bad actually, very poor skill for playing with both hands, no sight reading). But about a year and a half ago I started playing in a band and I really, really, enjoyed it. Playing music alone is one thing but with other people it's something else.
But things went on and I ended up in this group here which is filled with players of great talent. I've composed keyboard/piano tracks for their songs and they really, really liked what I did. I was supposed to go record my parts a month ago but the guitarist took me alone in the rehearsing room and had me play with a metronome. I panicked. I have really poor rythmic skills. So I started practicing my scales, arpeggios and runs with the metronome. It's going okay.
But I really have a lack of the rythmic side, I takes me a lot of time to actual feel the rythmic and any run that isn't all on the clicks (don't know how to explain in english) loses me. It's a progressive kind of group so there's odd times sometimes, there's some kind of tricky runs to count.
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So here is what I currently do for my daily exercises.
C harmonic minor scale, D harmonic minor scale, D major scale, D diminished scale, A harmonic minor scale. All those starting from 80 bpm up to 100 bpm.
C minor arpeggio, C dimished arpeggio, F minor arpeggio, F diminished arpeggio. All those starting from 100 to 120 bpm.
I do those scales and arpeggios in eighth notes.
Then I usually just jam on my keyboard for half an hour and then I practice que three songs I know from the band (which are like 8 minutes each) two of three times each.
Then I end up practicing specific riff with the metronome.
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So my problems are the following.
1) Do you have any tips, exercises or tricks I could use to get better at rythmic and with the metronome aside from doing my daily exercises with my metronome ? I really need to get better with the metronome and to be more tight when I play with the band. They won't be able to wait forever for me and I want to increase my level.
2) Here two runs I'm having trouble with.

The first one is because I kind of see the run visually by group of three sixteeth note, like the way it's played, but I have to count it in group of four.
So for now I play it at 80 bpm and really accentuate the notes on the beats and that's goes ok. But when I increase to the real speed of 100 bpm it's not going well...
The second one is going well technically but I'm having problems with the beats. After my first chord, the notes starts between two beats, which is a problem to me. I have a problem to feel that. I kind of cheat it and simply feel it after the 2nd beat
So I'd like advices for those riff in particular.
3) Also, I'm not often using my left hand, mostly for each chords. But I'm ok with that. My right hand is fairly quick but when we took a look at my playing we noticed my notes and not always even and I'd like to improve that aswell.
P.S: I've ordered the Hanon book.
Thanks in advance. I'm kind of panicking and it's really appreciated !