Ok, so she is about to be nerfed, and I have her on 3/70.
Current team, all mid-emblemed 4/80:
Mother North
LOTL
Costume Liana
Kage
Poseidon
I find MN and LOTL work really well together… LOTL, boosting any resurrections MN makes.
Got quite a few reasonably good ones waiting in the wings, also on 4/80:
Sartana, Grazul, Isarnia, Rana, Grimble, Miki, Azlar.
You’ve got a lot of really solid heroes that are already levelled, so waiting a week or two until there’s more clarity on the magnitude of Telluria’s nerf won’t hurt you much. I’d definitely do that.
There really isn’t enough information here to advise you
Do you have any other viable green options, like Kingston, Evelyn? You’re not telling us what other choices you might have
Playstyle. Do you like a longer game or snipers? AOE? Are titans a priority?
As above, do you use green war tanks?
How many tonics do you have?
Personally I think Telluria will remain a premier hero and worth the tonics, but without really understanding your other options and priorities it is difficult to confirm your needs
Unless you have another green hero waiting trying to decide between the 2 then we have that discussion. But if she is your only green then what are you waiting for.
Wait. Mats are too hard to come by. From beta through release through new beta, nothing SGG has done gives any reason to believe you won’t be wasting your mats. You can afford to wait.
I’d wait a couple of weeks until Version 30 is released.
Telluria is being nerfed and at this point the extent of the damage is not yet known. In the first beta nerf, it really weakened Telluria a lot, and if that is the final nerf, it may affect your decision. The second beta verson was not as severely nerfed, but it still may affect your decision.
You already have three great greens leveled up to 4/80, so it doesn’t seem all that urgent for you to level up Telluria right now. But if you feel it is urgent, go for it! Just understand you may be disappointed eventually.