Neutral or +def -spd tiki?

Tiki's my merge project atm I'm just waiting for a good IV spread for her. Personally I'd recommend + Attack - Speed or + Resistance -Speed. Her defence is already insane with her Attack/Defence bond refine so there's no need to increase it any further. You can never have enough attack so more damage is always a good option but more resistance can make her mediocre stat to something really good so she can tank even more units. I'm really hoping a Warding Breath or Distant Counter seal comes out at some point so I can run both skills on her.

Did you look on this site's page for A.Tiki? The IV recommendations on this site aren't always good but they often contain at least some good nuggets, and last I checked the A.Tiki page I liked their recommendations.

+Def -Spd makes her near invulnerable to physical damage. I prefer a focused tank rather than mixed but going +Res -Spd helps her with that.