Krawler/Subterror

Most of the strategy revolves around setting your flip monsters and using Subterror Guru to set the back down after using their effects, being able to also summon Subterror Behemoth Umastryx and World Legacy - "World Armor" in the process to have control over the board with big minions and strong effects that banish(Umastryx) or destroy(Krawler Spine) monsters.

You should work with what u have, so if u can summon Umastryx u should link summon Subterror Behemoth Fiendess and start flip summoning to take advantage of her effects. If not u should try to controll the board and wait for a Guru so you can search Umastryx or a World Legacy's Mind Meld to activate your Krawler's second effect to summon Deus X-Krawler and another Krawler (depends on the situation but Spine or Axon are usually better as they provide a good defence)

Golem Sentry can use the effect to turn itself face-down and start a combo with Umastryx, that can summon a second or even third one if you are lucky.

Lastly, Tindangle Angel is used, of course, to special summon flip monsters from your hand, but its effect can be very usefull to bring out Umastryx for your hand or GY when there is no way to flip monsters face-down, becoming na easy way to start the combo wih the Subterror Fiendess

You  will understand the deck as you play but these are some tips i can give for now.