HP Battery: Warforged Artificer + Large Weapon Familiar, double hp trick via Shield Other item custom used by your familiar on yourself. Basically using the Weapon familiar as a HP battery, and its pretty strong with half your hp + 20*2 (for a hafted weapon) +10 / enhancement +1 (greater magic weapon it up), or 50 at least + whatever else.
Also gets double duty from repair infusions and can double persist things with you like, cloud of knives for example.
Low level melee persist combo: Bite of the Wererat + Fist of stone + Elation (+8 strength, +8 dex, + 2 con, gain bite/slam attack, +5' movement) + Alter self large animated object (Warforged only) = 1 slam for forged, 1 slam for large sized, 1 slam for fist of stone, 1 bite attack at lvl 5, use bite as your secondary so your slams don't take penalties, and 75 movement for a wheeled form (Optimus Prime, ear your heart out).
+ other goodies like: Divine Sacrifice, Haste (Swift), Fly (Swift).
Aspect of the Earth Hunter shared with your familiar: Double trouble from Bulettes and can be persisted.
Wand of Heroics and Wand of
Mirror Move, turn even more melee-tastic.