~*´¨¯¨`*·~-.¸-AIN'T
Arcane
I feel like it doesn't make much sense to multiclass with a grenadier. Your bombs' damage is directly derived from your alchemist level, and the things higher levels of alchemist unlock are all really good. If you take the fighter levels early you are delaying the point you get fast bombs, so the BAB increase doesn't lead to more bombs per round. If you take them in the middle you're messing with the biggest power spike for alchemist (fast bombs -> force bombs -> greater mutagen/cognatogen). If you take them after that you're probably forgoing grand mutagen/cognatogen given the fact most people are ending the game around level 16. Plus losing extract (spell) progression, it doesn't seem worth it. You don't really need the extra feats, and your BAB will be fine for ranged touch attacks as a full grenadier.Dwarf fighter/grenadiers work or its better to go full alchemist?
If you want to do an alchemist multiclass, roll a vivi.