League of Legends (LoL) Question: are this runes good for an ad mid tristana ?

Hybrid penetration runes are more expensive than armor penetration runes, and will grant less armor penetration, which an AD Tristana needs.

Seals are primary (stronger) with defense and utility stats.
So get armor seals or health seals.

Glyphs are primary with spellcasting and spell resistance.
It's good that you want MR, but not per level, since you are already probably up against a powerful magical damage dealer.

Quintessence are broad, they have many primaries.
For AD Tristana, I'd recommend either flat AD or armor penetration.
Both have their pros and cons.

I hope it helped :P

It depends on whether you want to be a menace late game or have more early game utility.

Your hybrid pen reds are only good if you're going to be casting spells often on your opponent (which can push your lane at early levels with Tristana). If you don't mind that, take the hybrid reds. If you want to be a bit safer, take flat reds(for good last hitting, more raw damage early game) or armor pen reds(helps much more late game than flat damage).

Your blues should definitely be flat if you are going mid because most mid laners will be able to push you out of lane due to the fact they actually have AP when they first come to lane.

Standard yellows are fine, meaning Scaling HP or Flat Armor.

Flat AD or armor pen reds
Flat Armor seals
Flat MR glyphs
Flat AD quints

You're going to be drawing minion aggro with autoattacks, I recommend flat armor. If you're against an AP mid and you really don't want armor, get HP/lvl seals instead.

If you went AD Trist mid you'd probably need flat MR instead of scaling, would probably suggest flat armor pen reds, and yellows scaling armor (not sure about these ones)

Hm, it's quite good from my point of view, but honestly, I'm not best person to answer this - I would never take Tristana to a mid lane. I don't know, I prefer the ADC bot role really. But I think that you could use a little more armor tbh. But since usually mid is full of AP casters, I think you're pretty good to go.