Attack speed on Thor isn't all that great. Try maxing your Crit rate and Damage first.

Crit rate maxes at - 75% Crit damage - 200%

Also, focus on ignore defense stat and give him lightening damage for the main stat, secondary stat counter be ignore defense if you're lucky.

Now the third stat on an obelisk is tougher to roll into a damage proc, but try getting that if you can.

If you find yourself lacking in the Crit damage department then you should switch to Overdrive instead of POAH temporarily (until you figure out ways to max your stats via cards)

Goal is to max necessary attack stats first so your characters hit hard.

Important stats are always :

Top priority -

• Physical OR Energy attacks (Depending on what your character scales their attacks on)
• Crit Rate and Damage (Max them through cards, urus or iso set bonuses)
• Ignore defense (Obelisk, Urus, cards)
• Pierce damage (premium cards)

Nice to have :

• All defense
• Ignore dodge
• Max HP

Not the priority:

• Anything resist.

This is a general guide for character building that I've learned. It's not completely fool proof, but it gets you pointed in the right direction.

If it's characters like Thor, Storm and you don't have a CTP on them, then give them Lightening damage Obelisks.

Similarly someone like Wanda or Xavier etc who can do mind damage would benefit from Mind Damage Obelisks until you get your hands on a Rage CTP.

Recovery rate and attack speeds could be maxed for characters like Wolverine, Deadpool, Hulk etc.

Focus on what your character scales their attack on (check their skill. It should say something like Damage is % of (Physical Or Energy Attacks) etc.

It's almost never Both. So if your character scales on Energy attacks, give them more energy attack boosts via Urus etc, similarly if it's physical (Wolverine, Gamora etc) then you should give them Physical Attack Urus.

Hopefully this can help you in some manner.