**NEED AS MANY ANSWERS AS POSSIBLE** Is my Tharja bad or not?

Forget about it. -Spd Tharja reaches 31 speed (37 with Darting Blow), which is quite average in today's metagame. Tharja needs to double to secure KOs and effectively use Desperation. Hone Speed support can help her and increase her power, but having a neutral or +Spd Tharja is always better. Fodder her for Rauorblade+

Darting blow kind of solves her problem of -spd but she's still great at killing Hector and BIke regardless. Nothing that can't be fixed with an S support and speed +1 though.

It's bad. -SPD hurts her offensively and defensively, a few extra points of resistance (not that her RES was great to begin with) won't help her when she'll be doubled far more often by many common units in the meta.

Personally, I'd either use her for now while watching for one with better IVs (I've pulled several 4* Tharjas) or inherit her blade tome to someone else (might be worthwhile to wait to see if another red mounted mage comes up for release soon).

Tharja sitting below 30 speed at 4* and sitting at a mere 31 at 5* with bolstered resistance, which for her is pitiful, is not worth it in the slightest.

She is a glass cannon and cannot and will not function with her stat spread in that shape. +Spd should always, always be her boon in my opinion, as there are more reliable and stronger A passives.

Otherwise, Darting Blow will basically just cover her weakness in one of the most major components with her and won't be enough to reach top tier speed.

She'll make a great fodder for the Blade Tome she has.

It is bad.

Wait for good one. Unless you're desperate.

Wait for a better one

Well what exactly are you trying to figure out? -Spd is her single worst bane, so it's not good. She will still nuke Hector and want relevant green mages. She may struggle to deal with fast sword units like Ryoma and with fast bow users.

Would I run her in arena? No; but I have a great +spd/-hp Tharja and wouldn't run that one in the arena either. BST is too low and raven tome provides better coverage if you want to run a red mage.

On the other hand, she's perfectly worthwhile to run in PvE content and is worth a build of you lack for red mages.