I have 2 questions about Sand for the more experienced team builders in here. Afaik the general formula for Sand teams seems to be TTar, Drill, Bulky Water, Bulky Grass, Additional Glue, Mega (before people get triggered: I know this is just a rough guideline and not NECESSARY roles. Just simplifying it for the sake of it here). Now,
a) how do you decide on your mega? Do you prefer to fill the spot with a pokemon that compliments your offense, breaking pokemon not dealt with by Exca + Latios (or w/e is in his spot)? Do you try to fill potential gaps left open in your defensive core? Do you just try to use a mega that checks top threats?
Obviously you ideally want all 3 of those aspects as perfect as possible, but if you had to choose, which one would you give the highest priority? And,
b) Ignoring Venusaur-M for now, the most common bulky grass types on Sand are Tangrowth and Amoonguss. How do you choose between THOSE two? Since they both basically fill the role of a physical defensive pivot (unless you wanna give up sleep for AV, but not sure how I feel about that), but one checks setup sweepers (most prominently CM Clef, because you don't always want to switch your excadrill into that), and the other gives Knock Off Support and more offensive presence... It's giving me a major headache ^^
Already thanks for you guys' answers!