I haven't done an SB template yet, but you should definitely go for a Str/Con charge, a haste or dex/qui charge (or both). These can be bought for feathers and/or farmed.
Additionally if you feel like managing many different charges you could items with offensive charges, like hrords belt (lifedrain charge) or a debuff charge (check the charge-sticky in the PvE-section for what is available)
EDIT: almost forgot to mention, defensive charges (like the buffcharges i mentioned) can be used from inventory, so you don't HAVE to template with them, although some also have quite nice stats. If you want offensive charges like the lifedrain, or a debuff, then that item has to be equipped to use it. (i am not sure if jewelry/armor can be switched with switch/moveitem command, if that's the case you could also macro it to equip the offensiv charge item, use charge, and equip your temp item again) If anyone knwos about this, please chime in
Regarding buff potions, the bare minimum you need would be Endurancereg and full-buffpotions.
I am not sure if i remember the names right, but when you search for invigoration in the housing zone you will find the endurance regen pots for around 120g (i like to go for the ones with 100charges, but you can get smaller ones for cheaper/charge). Searching for "combined forces" will let you find potions that give you a fullset og blue buffs (base and spec). I believe they cost around 700-750gold.
Prices could have changed a lot since i checked last though, so take those numbers with a grain of salt