Well, you should already be able to link base artes to arcane artes so long as they're not consecutively from the same arte line(like you can't link Fang Blade>Fang Blade Havoc, or Havoc Strike>Raging Havoc).
But there are 2 AD Skills that help combos along. Super Chain(pAtk +60, Agi +60) allows you to link arcane artes to base artes, so you can link: base>arcane>base
And the other is Ability Plus(pAtk +80, Agi +80), which allows you to link 2 base artes together, leading to combos like: base>base>arcane>base or base>arcane>base>base
It MIGHT be possible to do base>base>arcane>base>base, but I really don't remember and I kinda doubt it.
But no matter what, you cannot consecutively use artes from the same line. It is okay in one combo though(like Havoc Strike>Rending Fang Blade>Havoc Strike). --- "It's not working. The banana is not melting." -Masaokis