If you are looking to Ranger past lives, I think the best breaks for Ranger are 9 (evasion) or 11 (free improved precise shot), because you need most class levels in Ranger to qualify for that past life. 15 also works for the extra Favored Enemy, but I don't think that's worth it on a repeater build. You definitely should mix in Artificer for the repeaters, but it's helpful to be specific about what you like and want out of Artificer beyond the repeater piece.
If you're into Battle Engineer I would suggest something like 12 Dark Hunter/ 6 Artificer / 2 Rogue. More sneak attack, can get T5 Battle Engineer, same full trap skills, etc.
If you are just into rune arms, then 12 Ranger/ 6 DL / 2 Artificer. You can switch DL with any other class too, but I think DL or Fighter offers best enhancements and stuff.
This thread (
https://forums.ddo.com/index.php?threads/the-ultimate-inquisitive-past-life-getter.3101) is specific to using Inquisitive for past lives, but I think it has ton of really good information on choices, why each choice is made, etc., that would help you.
If you're looking for a great repeater build, then this (
https://forums.ddo.com/index.php?threads/cyborg-u66.10077/) is most likely the best repeater build in the game at this point. Lots of good information and gear choices that you can translate over to your build too.