Technically, having any dex-only equips will make you a low-dex sin, but you did mention getting a luk sauna as being better, so yays.
The cape should not be clean. First of all, that +10 avoid is all but useless as a dexless; your avoid is already one of the highest in the game for your lvl range. Look for a 8+luk old raggedy, or a 2+ att black ragged cape. Sins' L7 damage is based heavily on w/att, so even the 2 att boost from the cape helps ALOT.
One more thing you could possibly add is an explaination of stars. You shouldnt go out and spend half your funds on one or two sets of expensive stars. This will make training all but impossible, and you will find CPQing to be difficult and frusterating. A good rule I went by:
lvl 10-30 you should have 5 sets of the same stars at MIN. Dont go out and buy one set of ilbi just to look 'pro'. Let's say you have 15mil to spend on stars as a newby dexless. You COULD spend all of it on about 2 sets of ilbi, or go for the 5 sets of steely. You need to balance quality and quantity when it comes to stars.