resto bar for questing/power leveling: 3 resto skills, Breath of Life, Puncturing Sweep;
destro bar for quest rewards: 2 resto skills, 2 destro skills, one skill from Dawn's Wrath tree;
Never level as healer or tank. It's really slow. Just get DD sets and 2-3 skills and slot the weapon and 2-3 skills you want to level on front bar. As Templar you can just fill your front bar with resto, 3-4 slot resto skills and spam puncturing sweep.
Use 5pc seducer set and 3x torug's pact (all with training trait) with any dropped jewelry. Use shock destro/restro combo. Put class and weapon skills that you want to level on the skill bar. Use puncturing strikes for melee damage/self heal. Heavy shock attacks for ranged AoE damage. Rapid regeneration as HoT and Breath of Life as emergency heal for dungeons. Add more relevant skills as you level up (Shards / Combat prayer / Ritual of Retribution / Blockade of Shock).