Which synastry aspects are strongest between 2 individuals?

Question

Which synastry aspects are extremely strong between 2 individuals when it comes to a romantic relationship? Is there any that guarantees instant attraction?

Answer 1

No aspect can guarantee instant attraction.

Good aspects are to the Sun, Moon, Venus and Jupiter.

An "instant" attraction could involve Neptune.

Answer 2

Top of the list for me would be the following:

1) Venus-Mars Conjunction : this one almost gaurantees instant sexual attraction

2) Venus-Pluto Conjunction : this is more karmic and indicates the possibility of the concept of Soulmates and a soulmate connection

3) Sun-Moon conjunctio : especially if its amle Sun and femlae Moon; this one indicates one of the strongest bons between the male masculinity and female feminity. A classic case of yin-yang balance and merging