no just pop a gigabit wire over.
if you have simple STP you can pop two wires over and create a loop, the switch will kill the loop but give you non-load balanced redundancy.
trunking/portchannel are required to increase over one gigabit but that opens up a whole world of issues.
simply connect one LAN port to the switch.
wireless just doesn't scale with consumer products on DD-WRT.
There is no magical unicorn for aggregation of 2 different simple bandwidth providers that reduces latency.
It would be cool if there was an app that could poll a list of websites and setup "preferred" path routing to common gaming servers with 2 different providers and sticky the connections . Anyone seen such a thing?
QOS adds overhead but might allow you to keep the leechers from reaching the 80% max bandwidth area that can cause lag.
Sounds like someone is either being a ASHAT or you have too many leechers on your network doing non-gaming deeds (torrent,vpn) and you need to QOS the gaming protocols/ip/machines - this might be as easy as saying all gamers to connection B primary - everyone else to A - but if a gamer is leeching and gaming that makes it a little bit harder.
Then you have ASHATS that ping flood your connection - not a lot you can do there. Not with 2 simple separate consumer SLA services.