ANSWER:

All of this is rewardable but standing up and reciting the Quran is greater for your reward. 

On these last 10 nights should i focus mainly on quran & prayer for getting most reward or i can read also tafseer,hadith (including quran & pray but for some less time as reading those things also) for getting more reward? Which is better?

Taraweeh, Tahajjud and Qiyam-ul-Layl |