Uh, R/Wd hits twice as many times as R/S you'll be doing more damage, substitute is nice but it only lasts you one hit. With R/Wd you get more pdef, and you can spam Shadow Prison as much as your heart desires because you're not reliant on energy. Also lol @ deadly shot, throwing daggers are perfectly fine for one-shotting nubs. Throat Attack is really the only place that R/Wd is weak (that and the whole 330 range paralysis, which is sort of OP tbh but only matters in team fights) but if you are having problems with priests throw out an elemental obstruction decrease their heals by 50% and damage of all the people around by 50% as well. Running solo? Use balloons to heal yourself to full with your Revival. Despite not having throat attack, their level of utility is ridiculous especially since you can spam SP.
Your forget that Combat Master makes R/S hit quite a bit harder with every skill (Coerce and Wraith Attack add to that too). For targets that R/S can one hit, R/Wd will need to hit twice. Deadly shot (a guaranteed crit with Combat Master from a t10 crossbow is a no laughing matter), vamp arrow, joint blow give R/S kiting, which does come in handy against 200k+ HP 200k+ pdef melee. Paralysis alone is at the top of the agenda of all healers.
Also you were the one who said that there was balance in the game and now you're taking that back? Since you think some classes aren't better than others?
Not really. It is just a matter of personal preference. As you pointed out, R/Wd can be extremely effective in siege. I argued that R/S has its strength too. I have seen just about every class combo played effectively in siege. I played R/S, S/R, R/Wd, S/Wd, Wd/S, P/K, P/S, S/K, P/M, M/P and enjoyed them all. Every combo has its strength that can be realized and every combo has its weaknesses that can be exploited. The ability to adjust to your opponent makes up a part of what I call "skill".
And as far as it goes, pushing endgame content doesn't require skill, it does require money and time. Sieging at the "top level" just requires money, time and people. Strategy matters more than skill all of the time in siege, you can be a "pvp god" but if you don't follow your team it can screw you up and them up majorly. Siege isn't just PvP even the most unskilled can make it to the top.
I have seen so many people lately who spend a lot of money and time on the game, yet cannot run endgame because they cannot run boss strategies. Endgame requires you to keep track on multiple things at the same time and that takes skill. How many people out there are overgeard for ToSH, yet can not take down Jenny? Teamwork is "skill" in my book.