The best way to get 'content ready' at 105... is to do CotF progression, and maybe camp a few augs.
You can buy a set of decent augs from West Karana vendors with CotF HA currency.
Once you get into TDS HA's there are a couple more augs that are good with TDS group currency.
Each rank of the Hero's Fortitude, Resolution, and Vitality AA are pretty much equivalent to a permanent gear upgrade...From Savior achievements in CotF.
Plus you end up with a few awesome clickies and augs as rewards... The Hero's Calling aug is one of the best ones in the game.
They're fairly easy to get, last forever, and make you a lot more capable of handling 105 content.
TDS missions are very easy, Especially the Katta one... takes about 15 minutes and you usually walk away with a piece of Castaway gear, a 101 or 102 spell, and/or an offslot item.
Castle Degmar Mission is also quick and easy(as long as you bring a chanter and a good tank)...higher tier gear and up to 105 spells...
Don't forget to keep grabbing the 4 Daily HA's from the guy in West Karana...