In reply to mmmhumous:
As a first timer you may be tempted to place more gear than an experienced alpinist might, which is fine on your first short routes as you develop your skills . Usually, with increasing experience, competence and technical climbing ability you will find you can carry / use less gear and make more accurate judgements as to what gear may be needed for any given route / conditions.
Some of those routes can be partially protected by deft rope handling ( weaving around solid (!) spikes and blocks ), well placed slings, clipping into existing pitons / bolts ( though these can be hard to spot )using alpine draws , and for the odd trickier section having 2-3 mid range cams ( I believe Camalots have the greater range per device ) and half a dozen mid to large wires can be useful. The only exception may be the Index Route where a few more wires and possibly an extra cam or two may be useful.
Your list of routes is great but I'd suggest having other options too, check route conditions in the OHM office and be flexible. For example, Index is a much longer walk than usual as the Flegere chairlift is out of action - you may find Mic et Mousse and / or La Simone good alternatives - these are close to the Brevent chairlift. The snow routes may be very soft / out of condition by August. The main pitch on the Lachenal Traverse, as the snow / ice melts, can become very loose and dangerous but you can traverse round it and then move up on snow ( if it is firm ) or drop down onto the glacier from the saddle before that pitch.
Obviously an ice screw each for crevasse rescue and some extra tat. Enjoy!!
