I echo what Twil says, CH/BGH in SL is an aggro magent... which can be handy in certain situations, if you don't have a decent tank, it works very nicely as a taunt so u can tank if needed
I tend to use BGH as an emergency heal in SL, if a team pulls too many mobs, it's a life saver sometimes... also the additional nanoskill bonuses are always needed...
I would work on getting Spec 3 as soon as possible, so that you can cast Cellular Recuperation as early as possible after lvl 175. This heal is _so_ much better than RK heals, its a must.
Also, try to get some alien levels, u get a little more AXP at lower levels it seems, since you will be fighting higher level mobs due to higher levels in cerbs. The champion of nano combat line certainly helps casting those SL heals earlier.
One thing I concentrated on, as trox anyway, but guess it applies to others, is having as much nano pool as possible... ie. using Bootlegger armour to increase it, using Arul saba bracers of +NP etc ... if u run out of nano you're as much use as a chocolate fire guard, so make sure u have plenty
As a trox, at level 200 I have close to 7.5k nano and hardly ever run out unless I'm DoTing or chain CH'in.
Along with that theme, max first aid if you don't already, so u can use the highest QL nano coils/stims... the SL ones are superb at QL175 so I made sure I could use them as early as poss.
Apart from that, just make sure u can cast the highest _stable_ init debuff you can at all times... UBT really is an awesome nano
Oh one other thing... try to find other doctors around your level and get to know em... helped me when in teams and I needed to go, I can just shoot off a few tells and get a replacement doctor quicker than waiting for one to come up on lft channel
My 2penneth...