Warmth was nerfed long ago. 10 hits/second is fine and no, there are no ways to boost the number of hits per second. TKM's can no longer be used effectively in Thors due to the introduction of shield reflect.
Why would you waste 3 AK cards in a +7/8 book? +10 book at the least, preferably a +8/9 slotted ele book. Easier just to use race/ele specific carded books.
The only MVP TKMs can do effectively (with the right gears) in a solo case is Drac. The rest would require a lot of support and in that case there are generally better killers available.
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