In a world without ToT, WN2 would be the best skill to use on these. Out of your 8 steps, you can not use a touch on one of them and still get your full 4 steps. Unfortunately, that is already used up by refreshing SH2. If just one good condition pops up in those 8 steps, you are faced with two options:
1. Take ToT and now you have paid 98cp for 3 steps. (32.7cp per step)
2. Ignore ToT at an opportunity cost of 20cp, effectively bringing the cost up to 118cp. (29.5cp per step)

MM1 is 30.7 per step. Manip is 29.3 per step. Discounting opportunity costs of ToT, WN2 is 24.5.

Mathematically speaking WN2 is the best of no good conditions proc. If you take a ToT proc, it falls behind MM1. If you ignore 1 ToT, then you break even with Manipulation. If a second or third good proc enters the picture, things look worse for WN2. Also, because hitting 7 will leave you at 5 durability, a second use of WN2 will get you one less step and is not worth using compared to other skills.