Let's say you're playing cash and the table is mostly tight. Buncha tags, tight passives, maybe one loose passive at the very most. You just doubled up and are sitting on at least 200BB. Would it be a good idea to start LAGging it up against all the rocks and tight aggressives assuming you have good reads on everyone?

Yes, but if you don't normally play a LAG game, you probably won't have much success at it.

i think you should leave the table, their are more profitabel opponents then rocks

When stacks are deep, hands like suited connectors go up in value, mainly because of the fold equity generated by semi-bluffs. (Threatening to shove 70+bb on the river means big turn barrels are very scary for someone with one pair). If your opponents don't adjust and keep playing tight, some hands that were "close folds" at 100bb should become standard opens and calls of 3-bets. Offsuit hands lose some of their playability when deep, and that might be problematic for you if you're unused to playing stuff like AQo with high SPRs.
If you're not comfortable playing deep, or have weak post-flop skills, leave the table as suggested above. The most-skilled players like playing post-flop deep, since that's where their skill advantage is converted into more dollars. If you're weak post-flop, you should buy-in short, or just not play at all.

if you win on this table it should be mainly a positive red line

a positive red line looks "swingy" in comparison to the green line vs dumb fish, so i prefer latter

In general, it's always good to play the opposite of the table .. provided you can handle all styles of play in your own game.

Table selection is huge, but if not available just remember that you are looking to build your stack slowly PF and on the Flop (maybe stop and go the Turn). Because if you get past the Turn with these folks you better have some pot control in place or it will be 2 steps forward and 3 steps back!! GL

if really tight and probably not as you did double up. tight players go the whole night without getting all in.

but in general all players end up loser in tight games after the long run.