Once I reach vr14 and make a more permanent set of gear, I'll probably try 5 heavy / 2 light but ultimately end up going 5 light / 2 heavy because I'll need the extra magica stats. In retrospect though, I probably would have gone Bretton for the magica. I haven't really dabbled in healing on this character yet but I know it will take more magica oriented gear than I have right now to sustain heals. I'm only focusing on getting to vr14 right now, but intend on using my Templar as a healer for pvp and group pve. I'm set up with 2 handed as primary, resto staff on 2nd bar, bow for situational use and I will invest in 1h/shield, once I get the spare skill points. I primarily use short ranged magic skills but I always have 1 stamina skill on my bar to take advantage on my Redguard passives.
I've been leveling an alt, Redguard Templar with full heavy, I've only reached v3 but I haven't had much problems with any pve content and can solo pretty much anything around my level.