Tier list?

What happened to it? Don't see the sticky anymore

It is old and irrelevant.

Can we start it up as a public thread channel, it's very hard for new players to value cards without it this also leads to less scamming

If you're looking to "value" cards, then here's a start:

https://docs.google.com/spreadsheet/lv?key=0Ah580hHTHdZadGN5QU9FRTE1TFNxM2FZMmVDaVV0VUE&type=view&gid=0&f=true&sortcolid=-1&sortasc=true&rowsperpage=500

That's the encyclopedia of units, and you can sort them by rarity, ground/air/sea attk, etc. You can compare their abilities and attack speed and figure out which units work best for you and figure out an appropriate value from the Trade Market forum. Of course, older LE units will be more valuable, even if their stats aren't as good, so that's something to keep in mind.

Seen it but doesn't show tier in events

I know it doesn't show tiers, but why can't you use the information in the list to figure out units' values by yourself?

Consider this: there are only so many events, and which events need specific units?

Panel - grinding, units don't matter
Mina's - strong units overall and strong allies
Training - For bosses, strong units with specific strengths in a category ie. melee with high ground, etc and good allies. For training, 4*+ event units for rarity increase
Tower - one strong leader unit, maybe event unit may be more useful
Arena - the only event where determining units really matter: low cost, high attack speed, good skills (KB>slow>aoe>poison)

There's really no need for tier lists when all this information is available, because tier lists are somewhat subjective and many times value is still dictated by artwork and rarity of the unit rather than it's actual usefulness.