Hello. I check a lot of guides about rooting but maybe I'm too newbie to implement working solution. I have two ISP: ISP1-WAN1, ISP2-WAN. And I want to redirect all trafic form game(udp 32800-32900) to WAN2.
Bridged lan ports - 5.5.5.1
WAN1 - 192.168.8.1
WAN2 - 1.2.1.1

I dont know what else should I tell so ask me more questions pls. I can even pay for help.

Please clarify some elements first:
* you want to route all traffic from lan outbound to internet?
* to specific UDP port on internet?
* "Bridged lan ports - 5.5.5.1": what do you mean by that?

In general, solution should be something like:
* mark all connections to UPD, ports <range> with a route-mark
* define new route table for given route mark in routing

Please clarify some elements first:
* you want to route all traffic from lan outbound to internet?
* to specific UDP port on internet?

I'm not sure because I am newbie. I want to achieve no lags in my game (world of tanks). And I think this is best options for me. Because my first ISP has low bandwidth but there is very low ping. My 2nd ISP generaly has like ~15-30Mbits connection speed. However my 2ISP(its LTE) and it has bandwith drops for like 2 times for 2-5 senods /minute.

* "Bridged lan ports - 5.5.5.1": what do you mean by that?

I just want to give some informations about my current configuration.

I found very simple solution. But Im not sure what will heppend when my GW2 will be down. I will be not able to play game?

https://i.imgur.com/Tt0RiOl.png

That is what I had in mind.
If you enable "ping check" on those static routes in WOT & ts3, then if that route becomes unavailabe, the connection will fall-back to your "main" ISP.

Well again I'm making some mistakes because it doesn't want to work. Would you like to help me via skype/teamviver? I will send you some money for help.

Please elaborate "doesn't want to work"

I was traing check if getway is rechable by ping dns 8.8.8.8 but Im doing sothing wrong. End when I disable internet by unplugging rj11 cable from my adsl router and internet is down, then the route rule was still activated.Maybe someone can send me a link to guide abut checing if getway is reachable by ping some host. I sow mikrotik advense scriptig wikipedia page but it dosent help me beacue I doing somethig wrong.

reff

first you need to implement this:
https://mum.mikrotik.com/presentations/US12/tomas.pdf


when you get to the way the traffic is split, you choose the criteria that matches wot e.g. ports and source ip