Zardnaar
Legend
4 rounds of a twin haste is 8 attacks. With 6 combats in a day that's 48 attacks granted (once you can twin 6 hastes in a day).
You also have the utility of having other things you can do than just grant attacks with those same spells and sorcery points. So while concentration is a drawback, versatility is a huge benefit.
Sorcerers don't heal either plus you will want other abilities.