1) Starting from upper right leg = -2 blocks for the same effort.
2) Some blocks can be done with lot less usage of cav (with recs)
3) Quad block here is quite complicated , risky and involves lots of cav (you have it already but i wouldn't like to loose a single one on this map) and the fact is XP from that block is not worth the effort, I wouldn't suggest playing this way in general.
4) Some camps are not worth touching at all like 1 Witch, 66 Cultist, 66 Dark Priests, 66 Firedancer which gives you less than 5xp/gc while avg on the map is over 20 (not counting the last tower).
Generally this adv is rather to get the tower down asap not really for xp, but if you calculate it right some camps are fair as an xp reward if you are still under lvl 50, but not all of them