Best immortal Arrows and rune combinations

So I'm currently on wave 4539 and I'm kind of having trouble defeating the waves. As of right now, I have 5 abomination arrows and I'm working on getting them all on enchantment 9 and immortal runes. My runes are Scatter, Burst and the normal rune with the three arrowheads (Idk its name, cause I'm playing on another language).

So my question is, what is the best immortal arrow plus rune combination for late game.